Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The equations of four circles are (x ± a) 2 + (y ± a) 2 = a 2 .
The radius of a circle touching all the four circles is
A
( 
–1)a
–1)a
B
2 
a
a
C
( 
+ 1)a
+ 1)a
D
(2 + 
)a
)a
Text Solution
Verified by ExpertsThe correct answer is:
C
Radius of outer circle = a + a 
= ( 
+ 1) a
Radius of inner circle = a 
– a = ( 
–1) a
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