Question

What is the radius of the circle?

Answer 1

50.27

Explanation:

The area of a circle =
`\pi r^(2)` where r is the radius.

We can count the radius (distance from that center dot to the outside of the circle) on this graph. It's 4.

So plug in 4 for r and solve.

area =
`\pi r^(2)`

area =
`\pi 4^(2)`

area = 16
`\pi`

area = 50.2654824574

This problem doesn't specify what to round to - - - but if you round to the hundredths place, it would be 50.27.