The circumference of a circle is 15.7 cm. What is the diameter? (use = 3.14)
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Circumference of circle= 2πr
=2×3.14×r=15.7
=6.28r=15.7
=r=15.7/6.28
=r=2.5
diameter=2×2.5=5cm.
hope it helps uhh.....
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