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The button on Camille's coat has a radius of $4$ millimeters. What is the button's circumference? $\newline$ Use $3.14$ for $\pi$ . If necessary, round your answer to the nearest hundredth. $\newline$ _____ millimeters

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Circles: word problems

Full solution

Q. The button on Camille's coat has a radius of

4

millimeters. What is the button's circumference?

\newline

Use

3.14

for

\pi

. If necessary, round your answer to the nearest hundredth.

\newline

_____ millimeters

Identify formula for circumference: Step $1$ : Identify the formula for circumference of a circle, which is $C = 2\pi r$ . Here, $r$ is the radius of the circle. $\newline$ Calculation: $r = 4$ mm, $\pi = 3.14$ . $\newline$ $C = 2 \times 3.14 \times 4$
Perform multiplication: Step $2$ : Perform the multiplication to find the circumference. $\newline$ Calculation: $2 \times 3.14 \times 4 = 25.12$ mm

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\newline

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