Answer: The area of the circle with a radius of 9 is approximately 253.94 square units.
Explanation:
The area of a circle is given by the formula A = πr^2, where A is the area, r is the radius, and π is approximately 3.14.
Given that the radius of the circle is 9, we can substitute this value into the formula to find the area:
A = πr^2 = π(9)^2 = 3.14 * 81 = 253.94
So the area of the circle with a radius of 9 is approximately 253.94 square units.
Note that the diameter of the circle is 18, which is twice the radius. If you knew the diameter you could also use the formula A = (π/4)*D^2 to calculate the area, where D is the diameter.