Choose the option that best completes the statement.
1. a figure has symmetry with respect to a point p if for every point q of the figure a partner point q' exists such that p is the of qq’.
2. a figure has symmetry with respect to a plane x if for every point k of the figure a partner point k' exists such that x is the of kk’.
3. a figure has symmetry with respect to a line m if for every point p of the figure a partner point p' exists such that m is the of pp’.
-perpendicular bisector, midpoint