Section 3
3.1 Orthogonal reflections about the axes
3.2 Reflection through the origin
3.3 Orthogonal projections onto the axes
3.4 Rotations about the origin through  90, 180, 270, 360, 0, -90, -180, -270, -360 degrees
3.5 Products of the above lintrs
3.6 Rotation about the origin through any angle
3.7 Orthogonal reflection about any line through the origin
3.8 Orthogonal projection onto any line through the origin
3.9 Similitudes about the origin (centered at the origin)