making an equilateral triangle using draw.line and pythagorean theorem

[Hendo]

Hi, I'm new to Turing and I have been trying to find a way to make an equilateral triangle using three draw.line commands and pythagorean theorem, but to no avail... It's in a module file so it will have to be able to be made any size that the user species. TIA!

[Clayton]

I already helped you out in the IRC channel, but for the benefit of others:

[Hendo]

ok, i know this isn't turing code but since i'm on my mac and im using TNT Basic, this is what I tried (you'll notice that TNT Basic and Turing are similar)

code:

procedure eq (int x, int y, int size, int col) int x2, y2, x3, y3, height height= InvTan (height/(size/2)) x2 = x+size y2=y x3=(x+size)/2 y3=x3+height set pen colour col Line x, y To x2, y2 set pen colour col Line x, y To x3, y3 set pen colour col Line x2, y2 To x3, y3 end proc while not Mouse Button set pen colour white paint canvas eq(100, 200, 50, red) draw frame wend

Unfortunately this created a scalene triangle...i must be doing something wrong....

[zylum]

you could try this thread for a nice solution: http://compsci.ca/v3/viewtopic.php?t=14543&highlight=triangle&sid=65c9d8edf28bf760b924a23f861c9663

if you *need* to use pythagorean then heres a method you can use:

your initial point is (x, y)
your side length is L so the next point on the base is (x + L, y)
the x coord for the last point is x + L/2
the y coord for the last point is (using pythagorean theorem) sqrt(L^2 - (L/2)^2)

sorry i was too lazy to draw up pictures