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25-02-2019
Mathematics

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the circumference of a circle is 36pi cm what is the radius

the circumference of a circle is 36pi cm what is the radius class=

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25-02-2019

Answer:

The radius is 18 cm

Step-by-step explanation:

The formula for circumference with radius is

C = 2*pi*r

We know the circumference is 36 pi

36 pi = 2 * pi *r

Divide by pi

36 pi/pi = 2 * pi/pi *r

36 = 2r

Divide by 2

36/2 = 2r/2

18 = r

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