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An acro dancer pauses in a precision handstand before handwalking across the stage.. A handstand is the act of supporting the body in a stable, inverted vertical position by balancing on the hands.
Rotational symmetry of order n, also called n-fold rotational symmetry, or discrete rotational symmetry of the n th order, with respect to a particular point (in 2D) or axis (in 3D) means that rotation by an angle of (180°, 120°, 90°, 72°, 60°, 51 3 ⁄ 7 °, etc.) does not change the object.