Two circles, each of radius 4 cm, touch externally. Each of these two – McqOptions

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1.	Two circles, each of radius 4 cm, touch externally. Each of these two circles is touched externally by a third circle. If these three circles have a common tangent, then the radius of the third circle, in cm, is
A.	π /3
B.	1
C.	1/√2
D.	√2
Answer» C. 1/√2

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