Question

explore the properties of rotation by following these steps.

1. the exact m∠apa is 90°. how does this compare with the conjecture you made in step 2?
2. use the protractor to measure this angle: m∠bpb =

Explanation:

Step1: Observe rotation property

In a rotation, the angle of rotation is the same for all corresponding points with respect to the center of rotation. Since $\angle APA' = 90^{\circ}$ and $\angle BPB'$ is also an angle of rotation about point $P$, they are equal.

Answer:

$90$