# What is the area of the circle whose radious is the diagonal of square whose area is 4 cm square

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by bire

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by bire

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4 = d square/2

8 = d square

d = root 8

area of circle = pie r square

= 22/7 * root 8 square

=22/7 * 8

=176/7

=29.3333

nd the diagonal of square formula = √2a

we know that side =2

so the diagonal =2√2

and the formula of circle =πr²

substitute and ans is 25.12