Question

The radius of a circle is 4 miles. What is the area of a sector bounded by a 90° arc?​

Answer 1

`\bold{4\pi\ square\ miles\approx12,56\ square\ miles}`

Explanation:

360°:4 = 90° so the area of a sector bounded by a 90° arc is a quarter of area of a circle of the same radius.

`A=\frac14\pi R^2=\frac14\pi\cdot4^2=\frac14\pi\cdot16=4\pi\approx4\cdot3,14=12,56\ square\ miles`

Answer 2

Answer:5

Explanation: