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CGP EDU Academic Team
Published on: August 13, 2026
If common tangents of x 2 + y 2 = r 2 and 
forms a square, then the length of diagonal of the square is
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10
Director circle of x 2 + y 2 = r 2 and 
is same
x 2 + y 2 = 2r 2 &x 2 +y 2 = 16 + 9 represents same circle
2r 2 = 25 
r = 
side of square = 2r = 
diagonal of square = 
(side of square) 
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