(i)[1]
Show that angle $BAC$ measures $0.6435$ radians, correct to 4 decimal places.
(ii)[5]
Find the shaded region’s area.
Mathematics 9709 · AS & A Level · Circular measure
Circular measure — practice question
The diagram displays an isosceles triangle $ABC$, with $AC = 16\text{ cm}$ and $AB = BC = 10\text{ cm}$. The circular arcs $BE$ and $BD$ are centred at $A$ and $C$ respectively, and $D$ and $E$ lie on $AC$.