Question

What’s the area of a circle with a diameter of 4

Answer 1

12.56 units²

Explanation:

Radius = 4/2 = 2

Area = pi × r²

3.14 × 2²

12.56

Answer 2

`4\pi` ≈ 12.57 units squared

Explanation:

The area of a circle is denoted by:
`A=\pi r^(2)`, where r is the radius.

Remember that diameter is twice the radius, so since the diameter equals 4, we know that the radius r = 4/2 = 2.

Now, plug this in:
`A=\pi *2^2=4\pi`

We can round 4pi to 12.57 units squared.

Hope this helps!