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Find the area of the quadrilateral …

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Find the area of the quadrilateral ABCD where AB=7cm,bc=6cm,cd=12cm,da=15cm and AC=9cm

    • Posted by Vidya Meshram 4 years, 3 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Gaurav Seth 4 years, 3 months ago

    area of quadrilateral ABCD= Area of triangle ABC + Area of triangle ADC
    Area of trianlge= sqrt(s(s-a)(s-b)(s-c))
    FOR area of triangle ABC
    s=(7+6+9)/2=11
    area of triangle ABC=sqrt(11(11-7)(11-6)(11-9))
    =sqrt(440)
    = 20.9761
    similarly,
    area of triangle ADC=54

    therefore area of quadrilateral ABCD=20.9761+ 54
    =74.9761

    1Thank You

    ANSWER
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