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OpenStudy (quickstudent):
Is this correct? circumference of circle image
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OpenStudy (quickstudent):
OpenStudy (phi):
yes. you have a 3-4-5 right triangle, so the diameter (the hypotenuse) is 5 and the radius is 5/2 C = 2 pi * r or 2*5/2 pi or 5 pi
OpenStudy (quickstudent):
Thanks!
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