Question

Find the circumference of this circle.

Use 3.14 to approximate ™.
C = 2πr
14 ft
C = [?] ft
Entered

Answer 1

43.96 ft

Explanation:

You want the circumference of a circle with diameter 14 ft.

Formula

The given formula expresses the circumference as a function of r. We know that r = d/2, so the formula can be rewritten in terms of d:

C = 2πr = 2π(d/2) = πd

For the given diameter, the circumference is ...

C = (3.14)(14 ft)

C = 43.96 ft

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