Question

Find the area of sector AOB. Express your answer in terms of pi and rounded to the nearest tenth.

Answer 1

63$\pi$

The sector is $\frac{70}{360}$; there are 360 degrees in a circle.
You use the formula $\pi r^{2}$.
18cm is the radius, and then you square it to get 324.
Multiply 324 by $\frac{70}{360}$
You get 63$\pi$