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    Question

    A triangle has sides 13 cm, 14 cm, and 15 cm. Find the

    area of the triangle.
    A 84 cmยฒ Correct Answer Incorrect Answer
    B 90 cmยฒ Correct Answer Incorrect Answer
    C 96 cmยฒ Correct Answer Incorrect Answer
    D 100 cmยฒ Correct Answer Incorrect Answer

    Solution

    Using Heronโ€™s formula: Semi-perimeter (s) = (13 + 14 + 15)/2 = 21 Area = โˆš[s(s - a)(s - b)(s - c)] = โˆš[21(21 - 13)(21 - 14)(21 - 15)] = โˆš[21 ร— 8 ร— 7 ร— 6] = โˆš7056 = 84 cmยฒ Correct answer: a) 84 cmยฒ

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