Three circle C1, C2 and C3 with radii r1, r2 and r3 (where r1 – McqOptions

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1.	Three circle C1, C2 and C3 with radii r1, r2 and r3 (where r1
A.	âˆš( r1r3)
B.	( r1 + r3)/2
C.	(2 r1r2)/( r1 + r2)
D.	âˆš( r1 + r3)
Answer» B. ( r1 + r3)/2

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