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Question
In the given figure, three circles with centres A, B, C respectively touch each other externally. If AB = 5 cm, BC = 7 cm and CA = 6 cm then the radius of the circle with centre A is
(a) 1.5 cm (b) 2 cm
(c) 2.5 cm (d) 3 cm
In the given figure, three circles with centres A, B, C respectively touch each other externally. If AB = 5 cm, BC = 7 cm and CA = 6 cm then the radius of the circle with centre A is
(a) 1.5 cm (b) 2 cm
(c) 2.5 cm (d) 3 cm
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Solution
If we add AB+BC+CA
=5+6+7
=18 cm
so radius will be half of it that is 9cm
=5+6+7
=18 cm
so radius will be half of it that is 9cm
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