Confirm Rotational Symmetry --- Totally Tessellated @ http://library.advanced.org/16661/
Instructions: Print two copies of page (preferably on lightweight or tracing paper) and then close this window. Line up the two pages and push a pin through the black dot centered below and through some cardboard or scratch paper. Then, keeping the bottom page steady, rotate the top page around this pin. See that after a rotations of 120 degrees, the original tessellation is exactly matched. Thus, this tessellation has rotational symmetry.
