TheApricots TheApricots

04-09-2016
Mathematics

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A circle has a circumference of 81.64cm. What is its Radius?

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Аноним Аноним

04-09-2016

[tex]circumference = 2 * \pi * radius[/tex]

[tex] \pi = 3.14[/tex]

[tex]Substitute \ 3.14 \ for \ \pi [/tex]

[tex]81.64 cm = 2 * 3.14 * radius [/tex]

[tex]81.64cm / (2 * 3.14) = radius [/tex]

[tex]81.64cm / 6.28 = radius [/tex]

[tex]13 cm = radius [/tex]

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