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In herons formula, exercise 12.2 question …

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In herons formula, exercise 12.2 question number 2 of quadrilateral ABCD, ? ABC we get area as 6 and of ? ACD we get 2root 21 And the question is how to find 2root 21????

    • Posted by Saliyahsumaiyahshaikh Sumaiyah Shaikh 4 years, 11 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    Rakhi Vasodiya11 4 years, 11 months ago

    In 2√21 , √21 is 4.6 so, 2×4.6=9.2 cm sq. So, 6×9.2= 15.2 sq.cm

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