Question

Help~~~~~~~~~~~~~~~~~~~~~~~~~

Answer 1

Explanation:

18.84=2\pi r\\ \\r=\dfrac{18.84}{2\pi}=\dfrac{9.42}{\pi}\ cm

The area of the circle is

Answer 2

28.25 square units

Explanation:

A circumference of the circle is

`C=2\pi r,`

where r is the radius of the circle.

So,

`18.84=2\pi r\\ \\r=(18.84)/(2\pi)=(9.42)/(\pi)\ cm`

The area of the circle is

`A=\pi r^2`

Substitute the value of the radius:

`A=\pi \cdot \left((9.42)/(\pi)\right)^2=(9.42^2)/(\pi)\approx 28.25\ un^2`