Randy wants to determine whether these two rectangles are congruent using only rigid transformations.

Select options from the drop-down menus to correctly complete each sentence.

He uses a
to make the bottom left vertices of both rectangles coincide.

Then he uses a
about this vertex to make the left sides of the two rectangles coincide. If all pairs of corresponding sides and angles are congruent, then Randy determines that this pair of rectangles is congruent.