The answer is D.
The formula to find area of a circle is : πr²
Here, we are given the diameter, but we need the radius. Always remember that the radius is always half the diameter.
Let's find the area.
- A = π × r²
- A = 3.14 × (3)²
- A = 3.14 × 9
- A = 28.26
- A ≈ 28.3
