Answer:
A circle with a diameter of 4 has an area of 12.57
Explanation:
So to solve for the area of a circle, we solve using this formula: A = π r^2. We also use the formula d = 2r.
A =1/4 π d^2 = 14 · π · 4^2 ≈ 12.56637
If we round we get 12.57.
So the area of the circle is 12.57