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27-04-2019
Mathematics

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what is the circumference of the circle r =9in

Respuesta :

27-04-2019

Answer:

[tex]\large\boxed{C=18\pi\ in\approx56.52\ in}[/tex]

Step-by-step explanation:

The formula of a circumference of a circle:

[tex]C=2\pi r[/tex]

r - radius

We have r = 9in. Substitute:

[tex]C=2\pi(9)=18\pi\ in[/tex]

[tex]\pi\approx3.14\\\\C\approx(18)(3.14)=56.52\ in[/tex]

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