(a)[2]
Find the angle $BAO$ in radians.
(b)[4]
Find the shaded region’s area.
(c)[3]
Find the shaded region’s perimeter.
Mathematics 9709 · AS & A Level · Circular measure
Circular measure — practice question
The diagram shows arc $AB$ as part of a circle centred at $O$ with radius $8\text{ cm}$. Arc $BC$ belongs to a circle centred at A with radius $12\text{ cm}$, and $AOC$ lies on a straight line.