Question

The following circle is not drawn to scale. Find the area of the circle. (Use 22/7 as an approximation for .)81What is the area of the circle? Round to one decimal place.Do not include units, ft?, in your answer.

Answer 1

The area of a circle (A) is computed as follows:

$A=\pi\cdot\frac{D^2}{4}$

where D is the diameter of the circle.

From the picture, D = 81 ft. Using 22/7 as an approximation of π, we get:

$\begin{gathered} A=\frac{22}{7}\cdot\frac{81^2}{4} \\ A=\frac{22\cdot6561}{28} \\ A=5155.1ft^2 \end{gathered}$