Jim's image so far best illustrates the easiest way to for that shape. Then again, if ultimately, we want a equilateral triangle with for example 1m on each side.... We have to use maths, such as pythagoras theorem, but the weird never ending figures simply will not produce an accurate shape.

So do you guys think its ok to say that, as far as complicated geometry are concerned (especially with arcs and curves), sketchup ain't that useful when dealing with accuracy.

Modeling this tetrahedron had been a real pain, but turns out the solution is a damn cube....

Suddenly i realised whether this shape is called a prism or not.

Anyway, jim, i tried that method, but my circles just wont meet each other. Care to correct me ? I used a 360 sided circle. Perhaps i connected it wrongly ?

Anyway to rephrase and reiterate my question more clearly, basically i just want to find out how to make the triangles on each side rotate up and meet to form a perfectly accurate "prism". All edges are equal in length.

Thanks for helping.

Hey guys,

Thanks for the reply, but the trick here is, it has a triangular base, not like pyramid with a square base. See attached file.

Yeah, lets just try to do it without any scripts and complicated maths.

prism shape.skp

Hi guys, after lurking for quite awhile, decided to post an interesting problem for all.

I am trying to make a prism, a four sided object with equilateral triangles on each side. Without using maths (sine cosine tangent ), or plugins ( if there are any), could anyone try and solve it ? I tried rotation of the 4 triangles but it failed.

Any ideas ?