Circumference of circles

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TACHS Math › Circumference of circles

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Find the circumference of a circle with the following radius:

$8\pi$

CORRECT

$16\pi$

$4\pi$

$\pi$

In order to find the circumference of a circle we will use the following formula:

$C=2\pi r$

In this equation, the variable, , represent's the circle's radius.

Substitute in for the circle's radius.

$C=2\times\pi \times 4$

Simplify and solve.

$C=8\pi$