Rotations around symmetry center can result in coincidence. Rotations can be fractions of 360 degrees: 180, 120, 90, 72, 60, 45, 30, and 15 degrees. 360 divided by rotation degrees makes whole number {order of symmetry}: 2, 3, 4, 5, 6, 8, 12, and 24.
Mathematical Sciences>Geometry>Transformation>Symmetry
3-Geometry-Transformation-Symmetry
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Date Modified: 2022.0224