This post contains some of my best pictures. These were made using only a bunch of right triangles to form a design in the shape of a regular polygon.
regular trigon(triangle)
regular tetragon(square)
regular pentagon
regular hexagon
The method for doing this is simple. Every regular polygon has a special right triangle. You can get this by using the center, any corner, and a midpoint of a side connected to the corner you used. Make a triangle using those three points. After that, it’s nothing but a bunch of coloring,duplicating, and rotating. It can all be done with inkscape as I did.