find the circumference of a circle whose radius is 15.4cm

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03-01-2014
Mathematics

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find the circumference of a circle whose radius is 15.4cm

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Please help me on this.

vivindalka vivindalka · Answer 1 · 2014-01-03T14:03:12+01:00

vivindalka vivindalka

03-01-2014

[tex]r=15,4\ cm\\C=2\cdot\ \pi\ \cdot\ r\\C=2\cdot\ \pi\ \cdot\ 15,4\ cm\\C=30,8\ \pi\ cm[/tex]

[tex] \pi\approx\ 3,14[/tex]

[tex]C=30,8\ \cdot\ 3,14\ cm\\C=96,712\ cm[/tex]

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Аноним Аноним · Answer 2 · 2014-01-03T21:59:27+01:00

Аноним Аноним

03-01-2014

π = 3,14

c = 2.π.r
c = 2.3,14.15,4
c ≈ 96,7

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