Question

a parallelogram rotates about its center. at what angle of rotation will the image of the parallelogram coincide with its preimage?
a. 30°
b. 90°
c. 180°
d. 270°
e. 315°

Explanation:

Step1: Recall property of parallelogram

A parallelogram has rotational symmetry of order 2 about its center.

Step2: Determine rotation angle

The angle of rotation for an object with rotational symmetry of order 2 is 180°.

Answer:

C. 180°