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Diameter

Find the diam...

Question

Find the diameter of a circle if the radius is:
$9 c m$

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Solution

Diameter of the circle is twice the radius of the circle.
$d = 2 r$
Given radius of a circle, $r = 9 c m$
Diameter of a circle, $d = 2 r = 2 \times 9 c m = 18 c m$
Hence, diameter of a circle is $18 c m$ if the radius is $9 c m$ .

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