question_answer

If d is the distance between the centres of two circles, \[{{r}_{1}},{{r}_{2}}\]are their radii and \[d={{r}_{1}}+{{r}_{2}}\], then   [MP PET 1986]

A)            The circles touch each other externally

B)            The circles touch each other internally

C)            The circles cut each other       

D)            The circles are disjoint

Correct Answer: A

Solution :

                      Clearly, circles touch each other externally.