(a) How many rigid motions (in two or three dimensions) are there for a square?
(b) Make a group table for these rigid motions like the one in Table 16.5 for the equilateral triangle. What is the identity for this group? Describe the inverse of each element geometrically.

Transcribed Image Text:

2.1 3.1 0 2 132021 20.1 31 2 12.0 2 31 0-212