The circumference of a circle is 8π cm. What is the DIAMETER of the circle?
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circumference = 8π
formula of circumference is 2πr
2πr = 8π. (π=π ,cancel)
2r=8
r=4
diameter=2r
=2*4
diameter =8
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Circumference of circle =2πr
8π=2πr
since, pie on both sides get cancelled
therefore, 8=2r
r=8/2=4
"r=4cm"
since diameter =2r
therefore, d=2×4=8cm
D=8cm.
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