Multiple Choice
Given two concentric circles (circles with the same center) with central angle α = 45°, r 1 = 4.5 m, and r 2 = 9 m, find the shaded area in the illustration below. Round your answer to three significant digits. 
A) 29.106 m 2
B) 47.713 m 2
C) 25.856 m 2
D) 7.594 m 2
E) 23.856 m 2
Correct Answer:

Verified
Correct Answer:
Verified
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