Question

find the area and the circumference of a circle with diameter 4 m

Answer 1

The area of a circle:
$2\pi \: {r}$

We need to first find the radius of the circle:
4÷2
=2

We can then find the circumference:
$2\pi(2) \\ = 4\pi \\ = 12.566...$
If you are to take absolute value,the answer would be 4兀m.

Otherwise,the aswer would be 12.566m.

Hope it helps!