Question

If FE measures 20 meters, the approximate area of circle B is what

Answer 1

Answer:
`\text{Area of circle B = 314.2 m}^2`

Explanations:

Note that FE is the dimater of the Circle shown.

Let the diameter be represented by d

d = 20 metres

Note: The radius of a circle is half its dimeter

Radius, r = d / 2

r = 20 / 2

r = 10 metres

The Area of a circle is given by the formula:

`\begin{gathered} A\text{ =}\Pi r^2 \\ \text{Where }\Pi\text{ = 3.142} \end{gathered}`

Substituting the value of the radius, r into the formula:

`\begin{gathered} A\text{ = 3.142}*10^2 \\ A\text{ = 3.142}*100 \\ A=314.2m^2 \end{gathered}`