If a figure has translation symmetry and reflection symmetry across the translation line, it:
A) always has a glide reflection.
B) sometimes has a glide reflection.
C) never has a glide reflection.

Question

Quizplus · Accepted Answer

A figure with both translation symmetry and reflection symmetry across the translation line sometimes has a glide reflection, depending on the distance and direction of the translation relative to the reflection line. Glide reflection is a combination of reflection and translation along a line, so not all configurations of translation and reflection symmetry will result in a glide reflection.

If a Figure Has Translation Symmetry and Reflection Symmetry Across