Question

quadrilateral efgh was dilated and rotated 90° clockwise about the origin to form quadrilateral efgh. which part of quadrilateral efgh is congruent to quadrilateral efgh?
its position on the grid
its area
its side lengths
its angle measures

Explanation:

Step1: Recall properties of dilation and rotation

Dilation changes size (area and side - lengths) and position. Rotation changes position. But congruent figures have equal angle - measures.

Step2: Analyze each option

Position changes due to rotation and dilation. Area changes due to dilation. Side - lengths change due to dilation. Angle measures remain the same for congruent figures formed by rotation and dilation.

Answer:

Its angle measures