Question

Given the two concentric circles with center Q below,

OQ = 11.5. Find the area of the shaded region. Round
your answer to the nearest tenth if necessary.

Answer 1

Explanation:

area of a circle formula is πr²

Find area of the larger and smaller circles and then subtract to find the shaded region. π = 3.14

area of the larger circle = π (11.5)²

3.14 (132.25)

415.265 units²

area of the smaller circle = π (5.5)²

3.14(30.25)

94.985 units²

subtract: 415.265 - 94.985 = 320.28 units²