Exercise 2 Page 587

Consider the given diagram.

We will find the measures of $\angle 1$ and $\angle 2$ one at a time.

Finding $\angle 1$

Looking at the diagram, we can see that the chord containing P, which is the center of the circle, is the diameter. Also, $\angle 1$ is subtended by the diameter. In this case, we can consider the Inscribed Right Triangle Theorem.