Question

Which measurement is a good estimate for the area of a circle if the radius is 4 meters?

Answer 1

The rule of the area of the circle of radius r is

`A=\pi r^2`

Since the radius of the circle is 4 meters, then

`r=4`

Substitute the value of r in the rule above by 4

Use pi = 3.14

`\begin{gathered} A=3.14(4)^2 \\ A=3.14(16) \\ A=50.24\text{ m}^2 \end{gathered}`

Then the area of the circle is about 50 square meters

The answer is the last choice