1.5: Intersecting circles and lens-shaped region

The diagram shows a circle, centre $A$, radius $10\text{ cm}$, intersecting a circle, centre $B$, radius $24\text{ cm}$. The two circles intersect at the points $P$ and $Q$. The radii $AP$ and $AQ$ are tangents to the circle with centre $B$. The radii $BP$ and $BQ$ are tangents to the circle with centre $A$.