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If the diameter of a tennis ball is 2.6 in what it the circumference in inches

User Bentedder
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If the diameter of a tennis ball is 2.6

then the radius will be 1.3 (because the radius f a circle is half of a diameter)

The circumference of a circle is given by any of these two formulae


\begin{gathered} C\text{ = }\pi D \\ or \\ C\text{ = 2}\pi r \end{gathered}

Using


\begin{gathered} \pi D \\ \text{Diameter = 2.6} \\ \pi\text{ = 3.14} \\ \end{gathered}

C = 3.14 x 2.6

C = 8.164 inches

User Sorifiend
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