Question

how we should find radius when circumference is given

Answer 1

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Formula to find the circumference of circle
$\bold{=2πr}$

So,

$\bold{Formula\: to\: find\: the \:radius\: of\: circle \:if \:it's\: circumference \:is \:given }$

$= > r = \frac{circumference}{2\pi}$

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Answer 2

Circumference of circle=2 pie r

So when circumference is Given,we can easily find out the radius by putting the value of circumference in 2 pie r

For e.g.,if circumference is Given 22 cm

Then,

2 pie r=22

=2×22/7×r=22 [U can also take pie as 3.14]

=2×22/7÷22=r

=2/7=r

Hope it will help u...