Question

What is the relation between the radius of circle 'r' and side of the square 'a' in this figure?

If $x\ast r=a$, type x.

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Answer 1

We know that the diameter of the circle is equal to the side of the square.

So.

a = diameter of circle = 2r.

⇒ 2r = a

⇒ x = 2.