Question

I have a circle whose radius is 2 1/16". How do I fit an equilateral triangle around the outside of it?

Answer 1

alternatively, you can do it using angles:
note that the circle would connect with the triangle at 3 evenly spaced points. so its 360 degrees would be divided by the 3 connections.

360/3 = 120 degrees.



then if you want to break this down even furthur: