Symmetry group P3, or 3 rotations through 120 degrees. This is quite a versatile symmetry group, and easy to accomplish. Only two lines to draw the outline of your classic tessellation. Continue reading
Symmetry Group Cmm, a.k.a., C2mm for us nerds. This is a tessellation built within a 30 / 60 / 90 degree triangle. It has mirrors on the 2 short sides and a two-fold rotation on the hypotenuse.