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The button on Clayton's shirt has a radius of $4\,\text{millimeters}$ . 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 Clayton's shirt has a radius of

4\,\text{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: Step $1$ : Identify the formula for circumference using radius. The formula is $c = 2\pi r$ . Here, $r$ is the radius of the circle.
Substitute Values: Step $2$ : Substitute the values into the formula. Given $r = 4$ mm and $\pi \approx 3.14$ . So, $c = 2 \times 3.14 \times 4$ .
Perform Multiplication: Step $3$ : Perform the multiplication to find the circumference. $c = 2 \times 3.14 \times 4 = 25.12$ mm.

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