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    1. Home
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    3. Quantitative Aptitude
    4. Geometry
    5. Find the area of triangle having sides 7m, 8m, and 9m.

    Question

    Find the area of triangle having sides 7m, 8m, and

    9m.
    A 12√5 m² Correct Answer Incorrect Answer
    B 2√14 m² Correct Answer Incorrect Answer
    C 6 m² Correct Answer Incorrect Answer
    D 2√66 m² Correct Answer Incorrect Answer

    Solution

    Here s = semi perimeter = (7 + 8 + 9)/2 =12m So area of this triangle = √(12(12 - 7)(12 - 8)(12 - 9))  = √(12 × 5 × 4 × 3) = 12√5 m 2 

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