Answer:
A = 176.7 units²
Step-by-step explanation:
Put the hint to use. Do these side lengths reflect the Pythagorean Theorem?
9^2 + 12^2 = 15^2?
81 + 144 = 225? YES
Therefore, this is a right triangle, and the diameter is 15 units.
Thus, the radius is 15/2 units, and the area is A = πr², or
A = π(15/2 units)² = (225/4)π units². Using 3.14 for π, we get:
A = 176.7 units²
