and there are 12 colors in total. There are 12 center cubies in a Megaminx. These 12 center cubies are represented by the 12 letters. The Megaminx has five-fold symmetry. T he C5 axis sits in the center of the pentagon. The C5axis goes through two opposite pentagon of the Megaminx . Because a Megaminx has 12 pentagons， with the connecting line of the center of Megaminx to WC as the axis， E; 2) A pentagon centered on S and its surroundings， G， while the other cubies are unchanged. At the same time， therefore there are 15 mirror planes. WAB is the intersection of three faces A。

rotating 180° counterclockwise. This is the definition in the textbook. In this video。

there are overall 20 C3 symmetry operations.