How to divide arc, line, and angle with a certain ratio?











up vote
5
down vote

favorite












A simple example:



documentclass[12pt,border=5pt]{standalone}
usepackage{newcent,pstricks,pst-eucl}
usepackage{auto-pst-pdf}
begin{document}
begin{pspicture}
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
end{pspicture}
end{document}


The result of compiling:



enter image description here



Question 1:



How to get a point M such as MA=2/3AB, or more generally MA=(a/b)AB and a point M' belong to small arc CA such as arc M'A=2/3AB, or more generally M'A=(a/b)AB.



Question 2:



How to get bisector of angle A BUT are two bisectors or three bisectors.



Responding to AS'comment below.



enter image description here










share|improve this question




















  • 1




    Can you explain your second question more clearly please? what do you mean by "BUT are ..."
    – Thruston
    yesterday










  • @Thruston In pst-eucl documentation, only to draw one bisector, " BUT are " is equivalent " to get". My English is not so good. :-))
    – chishimotoji
    yesterday

















up vote
5
down vote

favorite












A simple example:



documentclass[12pt,border=5pt]{standalone}
usepackage{newcent,pstricks,pst-eucl}
usepackage{auto-pst-pdf}
begin{document}
begin{pspicture}
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
end{pspicture}
end{document}


The result of compiling:



enter image description here



Question 1:



How to get a point M such as MA=2/3AB, or more generally MA=(a/b)AB and a point M' belong to small arc CA such as arc M'A=2/3AB, or more generally M'A=(a/b)AB.



Question 2:



How to get bisector of angle A BUT are two bisectors or three bisectors.



Responding to AS'comment below.



enter image description here










share|improve this question




















  • 1




    Can you explain your second question more clearly please? what do you mean by "BUT are ..."
    – Thruston
    yesterday










  • @Thruston In pst-eucl documentation, only to draw one bisector, " BUT are " is equivalent " to get". My English is not so good. :-))
    – chishimotoji
    yesterday















up vote
5
down vote

favorite









up vote
5
down vote

favorite











A simple example:



documentclass[12pt,border=5pt]{standalone}
usepackage{newcent,pstricks,pst-eucl}
usepackage{auto-pst-pdf}
begin{document}
begin{pspicture}
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
end{pspicture}
end{document}


The result of compiling:



enter image description here



Question 1:



How to get a point M such as MA=2/3AB, or more generally MA=(a/b)AB and a point M' belong to small arc CA such as arc M'A=2/3AB, or more generally M'A=(a/b)AB.



Question 2:



How to get bisector of angle A BUT are two bisectors or three bisectors.



Responding to AS'comment below.



enter image description here










share|improve this question















A simple example:



documentclass[12pt,border=5pt]{standalone}
usepackage{newcent,pstricks,pst-eucl}
usepackage{auto-pst-pdf}
begin{document}
begin{pspicture}
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
end{pspicture}
end{document}


The result of compiling:



enter image description here



Question 1:



How to get a point M such as MA=2/3AB, or more generally MA=(a/b)AB and a point M' belong to small arc CA such as arc M'A=2/3AB, or more generally M'A=(a/b)AB.



Question 2:



How to get bisector of angle A BUT are two bisectors or three bisectors.



Responding to AS'comment below.



enter image description here







pstricks pst-eucl






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited yesterday









Artificial Stupidity

4,82111039




4,82111039










asked yesterday









chishimotoji

543212




543212








  • 1




    Can you explain your second question more clearly please? what do you mean by "BUT are ..."
    – Thruston
    yesterday










  • @Thruston In pst-eucl documentation, only to draw one bisector, " BUT are " is equivalent " to get". My English is not so good. :-))
    – chishimotoji
    yesterday
















  • 1




    Can you explain your second question more clearly please? what do you mean by "BUT are ..."
    – Thruston
    yesterday










  • @Thruston In pst-eucl documentation, only to draw one bisector, " BUT are " is equivalent " to get". My English is not so good. :-))
    – chishimotoji
    yesterday










1




1




Can you explain your second question more clearly please? what do you mean by "BUT are ..."
– Thruston
yesterday




Can you explain your second question more clearly please? what do you mean by "BUT are ..."
– Thruston
yesterday












@Thruston In pst-eucl documentation, only to draw one bisector, " BUT are " is equivalent " to get". My English is not so good. :-))
– chishimotoji
yesterday






@Thruston In pst-eucl documentation, only to draw one bisector, " BUT are " is equivalent " to get". My English is not so good. :-))
– chishimotoji
yesterday












2 Answers
2






active

oldest

votes

















up vote
5
down vote



accepted










Step 1



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
end{pspicture}
end{document}


Note: HomCoef cannot accept RPN 2 3 div so I have to insert 0.6666 (3 decimals places should suffice, I think).



enter image description here



Step 2



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
end{pspicture}
end{document}


Note: AngleCoef must come before RotAngle. It is not commutative!



enter image description here



Step 3 (Final)



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=0.6666,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}


Note: We have pstSegmentMark (ends with Mark) to mark a segment but we have pstMarkAngle (begins with Mark) to mark an angle. It seems the package author likes making inconsistent names.



enter image description here



Last Edit



pscalculate from pst-calculate package can make me possible to insert infix calculations fed to the HomCoef and AngleCoef.



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}
usepackage{pst-calculate}
begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=pscalculate{2/3}]{A}{B}[M]% Now without hard coded 0.6666
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=pscalculate{2/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}





share|improve this answer



















  • 1




    Very good. This is a exciting trick.
    – chishimotoji
    yesterday


















up vote
4
down vote













documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.667]{A}{B}[M]
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointSymbol=none,PointName=none}
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M1]
pstRotation[AngleCoef=0.667,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M2]
pcline[linestyle=dashed](A)(M1)
pcline[linestyle=dashed](A)(M2)
end{pspicture}
end{document}


enter image description here






share|improve this answer























  • Mr. Herbert, could you modify the HomCoef and AngleCoef to be able to accept postfix notation? Defining a new command named pstAngleMark as an alias of pstMarkAngle. Modifying the core such that AngleCoef and RotAngle can be interchanged. Thank you!
    – Artificial Stupidity
    yesterday












  • I found a "bug" in psCircleTangents. See my answer. Try change x from 3 to 5 with step 1. The tangent line moves from one side to opposite side when the radii change from smaller to equal.
    – Artificial Stupidity
    yesterday













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2 Answers
2






active

oldest

votes








2 Answers
2






active

oldest

votes









active

oldest

votes






active

oldest

votes








up vote
5
down vote



accepted










Step 1



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
end{pspicture}
end{document}


Note: HomCoef cannot accept RPN 2 3 div so I have to insert 0.6666 (3 decimals places should suffice, I think).



enter image description here



Step 2



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
end{pspicture}
end{document}


Note: AngleCoef must come before RotAngle. It is not commutative!



enter image description here



Step 3 (Final)



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=0.6666,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}


Note: We have pstSegmentMark (ends with Mark) to mark a segment but we have pstMarkAngle (begins with Mark) to mark an angle. It seems the package author likes making inconsistent names.



enter image description here



Last Edit



pscalculate from pst-calculate package can make me possible to insert infix calculations fed to the HomCoef and AngleCoef.



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}
usepackage{pst-calculate}
begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=pscalculate{2/3}]{A}{B}[M]% Now without hard coded 0.6666
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=pscalculate{2/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}





share|improve this answer



















  • 1




    Very good. This is a exciting trick.
    – chishimotoji
    yesterday















up vote
5
down vote



accepted










Step 1



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
end{pspicture}
end{document}


Note: HomCoef cannot accept RPN 2 3 div so I have to insert 0.6666 (3 decimals places should suffice, I think).



enter image description here



Step 2



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
end{pspicture}
end{document}


Note: AngleCoef must come before RotAngle. It is not commutative!



enter image description here



Step 3 (Final)



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=0.6666,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}


Note: We have pstSegmentMark (ends with Mark) to mark a segment but we have pstMarkAngle (begins with Mark) to mark an angle. It seems the package author likes making inconsistent names.



enter image description here



Last Edit



pscalculate from pst-calculate package can make me possible to insert infix calculations fed to the HomCoef and AngleCoef.



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}
usepackage{pst-calculate}
begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=pscalculate{2/3}]{A}{B}[M]% Now without hard coded 0.6666
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=pscalculate{2/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}





share|improve this answer



















  • 1




    Very good. This is a exciting trick.
    – chishimotoji
    yesterday













up vote
5
down vote



accepted







up vote
5
down vote



accepted






Step 1



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
end{pspicture}
end{document}


Note: HomCoef cannot accept RPN 2 3 div so I have to insert 0.6666 (3 decimals places should suffice, I think).



enter image description here



Step 2



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
end{pspicture}
end{document}


Note: AngleCoef must come before RotAngle. It is not commutative!



enter image description here



Step 3 (Final)



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=0.6666,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}


Note: We have pstSegmentMark (ends with Mark) to mark a segment but we have pstMarkAngle (begins with Mark) to mark an angle. It seems the package author likes making inconsistent names.



enter image description here



Last Edit



pscalculate from pst-calculate package can make me possible to insert infix calculations fed to the HomCoef and AngleCoef.



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}
usepackage{pst-calculate}
begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=pscalculate{2/3}]{A}{B}[M]% Now without hard coded 0.6666
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=pscalculate{2/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}





share|improve this answer














Step 1



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
end{pspicture}
end{document}


Note: HomCoef cannot accept RPN 2 3 div so I have to insert 0.6666 (3 decimals places should suffice, I think).



enter image description here



Step 2



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
end{pspicture}
end{document}


Note: AngleCoef must come before RotAngle. It is not commutative!



enter image description here



Step 3 (Final)



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=0.6666]{A}{B}[M]% 2/3 --> 0.6666
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=0.3333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=0.6666,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}


Note: We have pstSegmentMark (ends with Mark) to mark a segment but we have pstMarkAngle (begins with Mark) to mark an angle. It seems the package author likes making inconsistent names.



enter image description here



Last Edit



pscalculate from pst-calculate package can make me possible to insert infix calculations fed to the HomCoef and AngleCoef.



documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}
usepackage{pst-calculate}
begin{document}
begin{pspicture}[showgrid=false](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=225]{A}{B}{C}{O}
pstHomO[HomCoef=pscalculate{2/3}]{A}{B}[M]% Now without hard coded 0.6666
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointName=none,PointSymbol=none}
pstRotation[AngleCoef=pscalculate{1/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P1]
pstRotation[AngleCoef=pscalculate{2/3},RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[P2]
pstInterLL{B}{C}{A}{P1}{Q1}
pstInterLL{B}{C}{A}{P2}{Q2}
psset{Mark=MarkHash,MarkAngle=90,MarkAngleRadius=.8}
pstMarkAngle{B}{A}{Q1}{}
pstMarkAngle{Q1}{A}{Q2}{}
pstMarkAngle{Q2}{A}{C}{}
psset{linestyle=dashed}
psline(A)(Q1)
psline(A)(Q2)
end{pspicture}
end{document}






share|improve this answer














share|improve this answer



share|improve this answer








edited yesterday

























answered yesterday









Artificial Stupidity

4,82111039




4,82111039








  • 1




    Very good. This is a exciting trick.
    – chishimotoji
    yesterday














  • 1




    Very good. This is a exciting trick.
    – chishimotoji
    yesterday








1




1




Very good. This is a exciting trick.
– chishimotoji
yesterday




Very good. This is a exciting trick.
– chishimotoji
yesterday










up vote
4
down vote













documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.667]{A}{B}[M]
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointSymbol=none,PointName=none}
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M1]
pstRotation[AngleCoef=0.667,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M2]
pcline[linestyle=dashed](A)(M1)
pcline[linestyle=dashed](A)(M2)
end{pspicture}
end{document}


enter image description here






share|improve this answer























  • Mr. Herbert, could you modify the HomCoef and AngleCoef to be able to accept postfix notation? Defining a new command named pstAngleMark as an alias of pstMarkAngle. Modifying the core such that AngleCoef and RotAngle can be interchanged. Thank you!
    – Artificial Stupidity
    yesterday












  • I found a "bug" in psCircleTangents. See my answer. Try change x from 3 to 5 with step 1. The tangent line moves from one side to opposite side when the radii change from smaller to equal.
    – Artificial Stupidity
    yesterday

















up vote
4
down vote













documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.667]{A}{B}[M]
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointSymbol=none,PointName=none}
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M1]
pstRotation[AngleCoef=0.667,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M2]
pcline[linestyle=dashed](A)(M1)
pcline[linestyle=dashed](A)(M2)
end{pspicture}
end{document}


enter image description here






share|improve this answer























  • Mr. Herbert, could you modify the HomCoef and AngleCoef to be able to accept postfix notation? Defining a new command named pstAngleMark as an alias of pstMarkAngle. Modifying the core such that AngleCoef and RotAngle can be interchanged. Thank you!
    – Artificial Stupidity
    yesterday












  • I found a "bug" in psCircleTangents. See my answer. Try change x from 3 to 5 with step 1. The tangent line moves from one side to opposite side when the radii change from smaller to equal.
    – Artificial Stupidity
    yesterday















up vote
4
down vote










up vote
4
down vote









documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.667]{A}{B}[M]
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointSymbol=none,PointName=none}
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M1]
pstRotation[AngleCoef=0.667,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M2]
pcline[linestyle=dashed](A)(M1)
pcline[linestyle=dashed](A)(M2)
end{pspicture}
end{document}


enter image description here






share|improve this answer














documentclass[pstricks,12pt,border=15pt]{standalone}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](-1,-3)(7,5)
pstTriangle(2,4){A}(0,0){B}(6,0){C}
pstCircleABC[PosAngle=60]{A}{B}{C}{O}
pstHomO[HomCoef=0.667]{A}{B}[M]
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{C}{O}{A}]{O}{C}[M']
psset{PointSymbol=none,PointName=none}
pstRotation[AngleCoef=0.333,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M1]
pstRotation[AngleCoef=0.667,RotAngle=pstAngleAOB{B}{A}{C}]{A}{B}[M2]
pcline[linestyle=dashed](A)(M1)
pcline[linestyle=dashed](A)(M2)
end{pspicture}
end{document}


enter image description here







share|improve this answer














share|improve this answer



share|improve this answer








edited yesterday

























answered yesterday









Herbert

267k23406716




267k23406716












  • Mr. Herbert, could you modify the HomCoef and AngleCoef to be able to accept postfix notation? Defining a new command named pstAngleMark as an alias of pstMarkAngle. Modifying the core such that AngleCoef and RotAngle can be interchanged. Thank you!
    – Artificial Stupidity
    yesterday












  • I found a "bug" in psCircleTangents. See my answer. Try change x from 3 to 5 with step 1. The tangent line moves from one side to opposite side when the radii change from smaller to equal.
    – Artificial Stupidity
    yesterday




















  • Mr. Herbert, could you modify the HomCoef and AngleCoef to be able to accept postfix notation? Defining a new command named pstAngleMark as an alias of pstMarkAngle. Modifying the core such that AngleCoef and RotAngle can be interchanged. Thank you!
    – Artificial Stupidity
    yesterday












  • I found a "bug" in psCircleTangents. See my answer. Try change x from 3 to 5 with step 1. The tangent line moves from one side to opposite side when the radii change from smaller to equal.
    – Artificial Stupidity
    yesterday


















Mr. Herbert, could you modify the HomCoef and AngleCoef to be able to accept postfix notation? Defining a new command named pstAngleMark as an alias of pstMarkAngle. Modifying the core such that AngleCoef and RotAngle can be interchanged. Thank you!
– Artificial Stupidity
yesterday






Mr. Herbert, could you modify the HomCoef and AngleCoef to be able to accept postfix notation? Defining a new command named pstAngleMark as an alias of pstMarkAngle. Modifying the core such that AngleCoef and RotAngle can be interchanged. Thank you!
– Artificial Stupidity
yesterday














I found a "bug" in psCircleTangents. See my answer. Try change x from 3 to 5 with step 1. The tangent line moves from one side to opposite side when the radii change from smaller to equal.
– Artificial Stupidity
yesterday






I found a "bug" in psCircleTangents. See my answer. Try change x from 3 to 5 with step 1. The tangent line moves from one side to opposite side when the radii change from smaller to equal.
– Artificial Stupidity
yesterday




















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