Answer: 180 degrees
Step-by-step explanation: If a parallelogram rotates about its center, then taking the 180 degrees as the angle of rotation, finally the image of the parallelogram will coincide with its preimage. Hope this helps
Answer with explanation:
The meaning of Rotation is that the angle through which geometrical shape is Rotated.The Preimage and Image are Congruent after Rotation.
It is given that ,a parallelogram rotates about its center.
A complete revolution =360°
⇒Rotating the Parallelogram through Different angles that is 90°,180°,270°,and found that when ,
⇒Angle =180°,the parallelogram coincide with its preimage.
