A circle has a diameter of 5.
What is closet to the area of the circle?
The formula for calculating the area of a circle is A = πr^2, where r is the radius of the circle.
Given that the diameter of the circle is 5, we can calculate the radius as half of the diameter, which is 2.5.
Plugging this value into the formula, we get A = π(2.5)^2 = π(6.25) ≈ 19.63.
Therefore, the closest whole number to the area of the circle is 20.