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+--- Thread: Construct two lines with specific angle in between (/thread-13624.html)
Construct two lines with specific angle in between - teerasak - 09-10-2019 05:06 AM
In Geometry app, there are set of geometry elements e.g line, circle, etc.
If I want to draw two lines (or perhaps rays) meeting at endpoint with specified angle (for example, drawing two lines meeting at the endpoint with angle between two line of 20 degree).
Any idea to do that in Geometry app?
RE: Construct two lines with specific angle in between - roadrunner - 09-10-2019 11:27 AM
Here is how I did it:
"GA:= point(-4.,−4.2); // c(FF000000) v(1) \nGB:= point(7.,3.3); // c(FF000000) v(1) \nGD:= circle(GA,GB-GA); // c(FF000000) v(1) \nGE:= element(GD,0); // c(FF000000) v(1) a(t(1) s(3) p(3) b(0) e(6.2832) S(0.2)) \nGG:= line(GA,GE); // c(FF000000) v(1) \nGH:= element(GD,20/180*π); // c(FF000000) v(1) a(t(1) s(3) p(3) b(0) e(6.2832) S(0.2)) \nGI:= line(GA,GH); // c(FF000000) v(1) \n"▶Instruction
angle(GA,GE,GH)
Perhaps someone else can come up with a more direct way to do it.
-road
RE: Construct two lines with specific angle in between - Albert Chan - 09-10-2019 03:01 PM
I don't know if this work with HP Prime, but I did it in XCas.
line1 := line([1,1], [3,4]);
line2 := line([1,1], slope = tan(20/180*pi + atan(slope(line1))))