Raja12345 Raja12345

03-05-2017
Mathematics

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I just need to know the answer as quick as possible!!!

I just need to know the answer as quick as possible class=

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melissaycui melissaycui

03-05-2017

First since you know the radius:3 the perimeter of a full circle would be
2pi x 3 = 6 pi. But since it's only half it would be 3 pi.

6+3+3+3pi gets you 12+3 pi

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tstein12345 tstein12345

03-05-2017

The answer would be 21.42cm as 6 + 3 + 3 = 12 and 2*3pi/2 = 3pi
3 pi = 9.42 and so 12 + 9.42 = 21.42 cm.

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