(i)[1]
Show that $OB$ measures $7.270\,\text{cm}$, correct to 3 decimal places.
(ii)[3]
Find the total perimeter of the metal plate.
(iii)[3]
Find the total area of the metal plate.
Mathematics 9709 · AS & A Level · Circular measure
Circular measure — practice question
The diagram depicts a metal plate $OABC$, made up of a right-angled triangle $OAB$ and a sector $OBC$ from a circle with centre $O$. Angle $AOB = 0.6$ radians, $OA = 6\,\text{cm}$ and $OA$ is perpendicular to $OC$.