steeepgcYil steeepgcYil

25-09-2016
Mathematics

Answered

find the circumference and area of a circle with diameter of 21 inches

Verified Answer :

mpanderla95 mpanderla95

25-09-2016

To solve for the circumference and the area of a circle, first you must determine the radius.

D = 21 inches
R = 1/2D = 1/2(21) = 10.5 inches.

C = 2pi • r
C = 2(3.14) • 10.5 inches
C = 65.97 inches.

A = Pi • r ^2
A = (3.14) • 10.5^2
A = 346.185 in^2.

The area of a circle is 346.185 in^2.

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