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Mathematics, 03.03.2020 18:30 granthazenp5e9mj

1)
The radius of a circle is 9. Using π, which equation expresses the ratio of the circumference of the circle to the circle's diameter?
A)
C
9
= π
B)
C
18
= π
C) C =
9π
r
D) C =
r
18π

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