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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. 120 inches D. 62.8 inches

Respuesta :

 C = pi*d = 2*pi*r
C = 2*pi*20 = 3.14*40 = 125.6in

A
RedRicin
For any circle, the circumfrence [tex]C=2\pi r=\pi d[/tex] where r is the radius and d is the diameter.
Use 20 inches for our radius in the formula [tex]C=2\pi r[/tex].
[tex]C=2\pi \times20[/tex]
Using π ≈ 3.14...
[tex]C\approx2\times3.14\times20[/tex]
[tex]C\approx6.28\times20[/tex]
[tex]\boxed{C\approx125.6\ inches}[/tex]

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