heyyyy2 heyyyy2

17-07-2016
Mathematics

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Can someone please answer. There is one problem. There's a picture. Thank you!

Can someone please answer There is one problem Theres a picture Thank you class=

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17-07-2016

It's about 172 degrees.

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dalendrk dalendrk

17-07-2016

[tex]Perimeter\ of\ the\ circle:L=2\pi r;\ r=7\\\\L=2\pi\cdot7=14\pi\approx14\cdot3.14=43.96\\\\\dfrac{21}{43.96}\approx0.477707\\\\0.477707\cdot360^o\approx171.97^o\approx172^o\\\\Answer:\boxed{172^o}[/tex]

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