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Deepak Bora
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In the given figure, find the perimeter of ΔABC, if AP = 12 cm.

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CBSE 10th Class Mathematics
Past year question paper
Year 2020
SET 1, Code Number  – 30/5/1
Question Number –  24 [b]
perimeter problem
triangle perimeter

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1 Answer

  1. Perimeter of ΔABC = AB + BC + AC
    = AB + BD + CD + AC
    = AB + BP + CQ + AC
    [Since BD = BP and CD = CQ]
    = AP + AQ
    = 2AP [AP = AQ, Tangents drawn
    from external point]
    = 2 × 12

    = 24 cm

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