Question

if the circumference of a circle is 66 cm find its diameter​

Answer 1

Answer:

the answer is 21 cm

Step-by-step explanation:

circumference=2*22/7*r(pi=22/7)

66=44/7*r

r=66*7/44

r=3*7/2

r=21/2

diameter=2r

=2*21/2

=21 cm

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Answer 2

circumference of circle =2πr

2πr=66

r=66×7/2×22

r=21/2

therefore r=21/2

diameter=2r

d=2×21/2

therefore diameter=21 cm

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