Originally Posted by

**mathatlast** I have been perusing these forums and I came across another question that was a bit helpful in clarifying this question. The question is:

With pictures and words, describe each symmetry in D3 (the set of symmetries in an equilateral triangle).

I think I could start with drating a point in the center of the triangle and draw a line to the midpoint of each side of the triaangle. I know that the answer involves three rotations (0, 120 and 240) but I do not really know what that information really means.

Thanks in advance for any help!