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ludmilkaskok [199]
4 years ago
11

What is the approximate circumference of a circle with a radius of 20 inches? Use π ≈ 3.14. A. 125.6 inches B. 251.2 inches C. 1

20 inches D. 62.8 inches
Mathematics
2 answers:
earnstyle [38]4 years ago
8 0
For any circle, the circumfrence C=2\pi r=\pi d where r is the radius and d is the diameter.
Use 20 inches for our radius in the formula C=2\pi r.
C=2\pi \times20
Using π ≈ 3.14...
C\approx2\times3.14\times20
C\approx6.28\times20
\boxed{C\approx125.6\ inches}
VikaD [51]4 years ago
4 0
 C = pi*d = 2*pi*r
C = 2*pi*20 = 3.14*40 = 125.6in

A
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