Question

Select the correct answer.

Which transformation will always map a parallelogram onto itself?
a 90° rotation about its center
A.
B.
a reflection across one of its diagonals
c.
a 180° rotation about its center
D.
a reflection across a line joining the midpoints of opposite

Answer 1

The answer is c.

This is because when it rotates a 180 degrees around its center it maps a parallelogram on to itself.