Rotational Symmetry


http://www.adrianbruce.com/Symmetry/10.htm

http://www.mathsisfun.com/geometry/symmetry-rotational.html

http://www.icteachers.co.uk/children/sats/rotational.htm

http://www.regentsprep.org/Regents/math/geometry/GT1a/PracRot.htm