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If the diameter of a circle is 9 cm, then its circumference is 56.52 cm. True or false?

If the diameter of a circle is 9 cm, then its circumference is 56.52 cm. True or false?
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1 vote
If the diameter of a circle is 9 cm, then its circumference is 56.52 cm.

True or false?

User Allen Pike
by
7.5k points

1 Answer

5 votes
circumference
2*pi*r
2*(22/7)*(9/2)
2*(11/7)*9
198 / 7
28.28 cm

so 56.52 is not correct
User Pramod Mali
by
8.6k points
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