Part A Identify a sequence of transformations that will show that trapezoid 1 must be congruent to trapezoid 2.

Explain why the trapezoids must be congruent.

Part B

A dilation, with center of dilation at the origin, will be performed on trapezoid 1 to create trapezoid 3, which is not shown.

Explain why trapezoid 3 must be similar to trapezoid 1, even though the scale factor is unknown.