A. The parallelogram must have been rotated by 90°.

B. The parallelogram must have been rotated by 180°.

C. The parallelogram must have been rotated by 360°.

D. The parallelogram could have been rotated by any number of degrees.

4.Suppose you have triangle ABC and triangle DEF, and they are similar, with a scale factor of 0.5. If the angle measures of ABC are 80°, 80°, 20°, what are the measures of the angles in DEF?

A. 40°, 40°, and 10°

B. 40°, 40°, and 100°

C. 80°, 80°, and 20°

D. Cannot be determined.

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