Question

find the circumstance of each circle. use your calculator's value of pi. round your answer to the nearest tenth.

Answer 1

The area of the circle is given by:

`\pi\cdot r^2`

where r is the radius of the circle

Given area = 615.8 yd^2

so, we will calculate the radius of the circle as follows:

`\begin{gathered} \pi\cdot r^2=615.8 \\ r^2=(615.8)/(\pi)=196.015 \\ \\ r=\sqrt[]{196.015}\approx14yd \end{gathered}`

So, the radius of the circle = r = 14 yd

The circumference of the circle =

`2\cdot\pi\cdot r=2\cdot\pi\cdot14=87.9646`

rounding the answer to the nearest tenth

So, the circumference = 88 yd