The composition (sum) of two reflections is equivalent to a rotation

Two reflections = one rotation

Note: We could consider the case of two parallel lines, in which case the point of rotation is at infinity, and the rotation becomes a translation.

Back to "Student Explorations"

Back to "Dynamic Geometry Sketches"

Michael de Villiers, first created 2008; updated to WebSketchpad, 4 July 2022.