Question

PLEASE HELP WITH THIS.




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Answer 1

65.94 cm²

Explanation:

12.5/2 = 6.25 = radius of large circle

8.5/2 = 4.25 = radius of small circle

A= πr²

A of large circle = 3.14(6.25²) = 122.66

A of small circle = 3.14 (4.25²) = 56.72

122.66 - 56.72 = 65.94 cm²

Answer 2

65.94

Explanation:

Find the area of the smaller circle and subtract it from the area of the larger circle. This is the area of the shaded region.

Larger Circle - If d = 12.5, then the radius r = 6.25.

Area = π(6.25)² = 122.66

Smaller Circle - If d = 8.5, then the radius r = 4.25.

Area = π(4.25)² = 56.72

Shaded region - 122.66 - 56.72 = 65.94