1 Answer

Palto · Answer 1 · 2023-01-15T16:52:23+0000

The circumference of a circle is 20π. What is the area of the circle?

A. 20π

B. 10π

C. 100π

D. 400π

Remember that

The circumference is equal to

$C=2\pi r$

we have

C=20pi

substitute the given value and solve for r

so

$\begin{gathered} 20\pi=2\pi r \\ r=10\text{ units} \end{gathered}$

Find the Area

$A=\pi\cdot r^2$

substitute

$\begin{gathered} A=\pi\cdot10^2 \\ A=100\pi\text{ unit2} \end{gathered}$

therefore

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