In the given figure, a circle touches the side BC of â–³ABC at P and AB and AC produced at Q and R respectively. If AQ=15cm, find the perimeter of â–³ABC.
A
30cm
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B
24cm
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C
15cm
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D
18cm
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Solution
The correct option is D30cm Thelengthsofthetangents,fromapointtoacircle,areequal.
Therefore AB = AP, BQ = BP, BP = CP
Perimeter = AC + AB + BC = 2(AB) + BP + PC = 2(AB) + 2(BQ) = 2(AQ) = 30 cm