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Find them area of a triangle …

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Find them area of a triangle twof sides of whigh are 18cm and 10cm and then perimeter is 42cm

    • Posted by Mayank Chadha 8 years, 6 months ago

    CBSE > Class 09 > Mathematics
    • 1 answers

    J K 8 years, 6 months ago

    The third side is 42-28 = 14 Semi perimeter =42/2 = 21 Area = √42(42-18)(42-10)(42-14) = √42×24×32×28 = √2x3×7(2×2×2×3)(2×2×2×2×2)(2×2×7) = 672√2

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