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Question

In the given figure, quadrilateral ABCD is circumscribed, touching the circle at P, Q, R and S. If AP = 6 cm, BP = 5 cm, CQ = 3 cm and DR = 4 cm, then the perimeter of quadrilateral ABCD is


(a) 18 cm
(b) 27 cm
(c) 36 cm
(d) 32 cm

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Solution

(c) 36 cmGiven, AP=6 cm, BP=5 cm, CQ=3 cm and DR=4 cm.Tangents drawn from an external points to a circle are equal.So, AP=AS=6 cm, BP=BQ=5 cm, CQ=CR=3 cm, DR=DS=4 cm.AB=AP+PB=6+5=11 cmBC=BQ+CQ=5+3=8 cmCD=CR+DR=3+4=7 cmAD=AS+DS=6+4=10 cmPerimeter of quadrilateral ABCD=AB+BC+CD+DA=11+8+7+10 cm=36 cm

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