Question

Find the radius of Circle which is outside of 20cm side Square ?
A. 10 √ 2
B. 10 √ 3
C. 2 √ 4
D. 5 √ 2​

Answer 1

Answer :

A. 10√2 cm

Explanation :

Let, r be the radius of circle.

Given,

Side of square = 20 cm

A circle is outside of a square i.e, square is inscribed in a cirle.

From the figure,

diagonal of square = diameter of circle

→ diameter of circle = √2 a

→ 2r = √2 a

→ r = a/√2

→ r = 20/√2

→ r = 10 √2

Therefore,

Radius of circle = 10√2 cm