Q1 of 59 Page 83

Four alternative answers for each of the following questions are given. Choose the correct alternative.

Two circles of radii 5.5 cm and 3.3 cm respectively touch each other. What is the distance between their centers?


Given that both the circles touch each other but not specified externally or internally.


The distance between the centres of the circles touching internally is equal to the difference of their radii.


⇒distance between their centres = 5.5 cm – 3.3 cm = 2.2 cm


If the circles touch each other externally, distance between their centres is equal to the sum of their radii.


⇒distance between their centres = 5.5 cm + 3.3 cm = 8.8 cm

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