Question

Find the circumference and the area of a circle with diameter 7m?

Answer 1

C: `7pi` meters
A: `12.25pi` meters squared

Explanation:

Circumference: `dpi` or `2pir` (`d` is the diameter and `r` is the radius, which is half the diameter)

Area: `pir^2`

Circumference: `7pi` meters (if you use an approximation such as `3.14` for `pi`, multiply that by `7`)

Area: `(7/2)^2pi`

Area: `12.25pi` meters squared (if you use an approximation such as `3.14` for `pi`, multiply that by `12.25`)