If a figure has two reflection symmetries across perpendicular lines, it:
A) always has a rotation symmetry.
B) sometimes has a rotation symmetry.
C) never has a rotation symmetry.

Question

Quizplus · Accepted Answer

A figure with two reflection symmetries across perpendicular lines always has a rotation symmetry of 180 degrees, because flipping it twice (once across each line of symmetry) is equivalent to rotating it half a turn.

If a Figure Has Two Reflection Symmetries Across Perpendicular Lines