Question

part Acalculate the exact area of the shape in terms of piA = cm²part Bcalculate the approximate area of the shape in terms of piA = cm²

Answer 1

We have the fourth part of a circle, so first we are going to calculate the area of the complete circle (AC)

`AC=\pi r^2=\pi\cdot20^2=400\pi`

then we divided AC between 4

`A=(400\pi)/(4)=100\pi`

the area is 100π