So we are off to find somewhere comfortable to sit. Angela: There are different types of symmetry, but we're going to talk about reflective symmetry. If you draw a line down something and the two ...

The dotted line down the middle of the letter A, below, is called a mirror line, because if you place a mirror along it, the reflection looks exactly the same as the original.

N-Rotation Point (a point with C_N symmetry) - indicated by the number N before any * Mirror Symmetry (a reflection) - indicated by a * M-Dihedral Symmetry Point (a point with D_M symmetry) - ...