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miss Akunina [59]
3 years ago
10

What is the area of a circle that has a circumference of 42 inches? A. 140.4 in2 B. 126.60 in2 C. 132.62 in2 D. 21.04 in2

Mathematics
1 answer:
tankabanditka [31]3 years ago
7 0
Circumference = 2 \pi r
                   42  = 2 \pi r
42/(2 \pi) = r
21/\pi = r

Area = \pi r²
         = \pi (21/\pi)²
         = 21²/\pi
         = 140.37
         ≈ 140.4

Answer: A





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