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Mathematics 4 Online
OpenStudy (quickstudent):

Is this correct? circumference of circle image

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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