find correct two decimal places, the radius of the circle with the given circumference: 35cm

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lizzie00 lizzie00

01-02-2015
Mathematics

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find correct two decimal places, the radius of the circle with the given circumference: 35cm

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naǫ naǫ · Answer 1 · 2015-02-01T11:35:11+01:00

naǫ naǫ

01-02-2015

[tex]C=2 \pi r[/tex]
C - circumference, r - radius

[tex]C=35 \ [cm] \\ \\ 35=2 \pi r \\ r=\frac{35}{2 \pi} \\ r=\frac{17.5}{\pi} \\ \boxed{r \approx 5.57 \ [cm]}[/tex]

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konrad509 konrad509 · Answer 2 · 2015-02-01T11:58:30+01:00

konrad509 konrad509

01-02-2015

[tex]C=2\pi r=35\\ 2\pi r=35\\ r=\dfrac{35}{2\pi}\approx5.57\text{ cm}[/tex]

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