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  • 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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