Two figures are said to be in a relationship of symmetry when one can be mapped to the other by a bijection such that two of their corresponding points are equidistant from and on either side of a point, line or plane.
Examples
In each illustration below, \(m\overline{\textup{PO}} = \moverline{\textup{PO’}} \).
- Symmetry about a point:
- Symmetry about a line:
- Symmetry about a plane:
