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    Question

    Find the area of triangle having sides 20 m, 21 m, and

    29 m.
    A 6 cm² Correct Answer Incorrect Answer
    B 30 cm² Correct Answer Incorrect Answer
    C 84 cm² Correct Answer Incorrect Answer
    D 210 cm² Correct Answer Incorrect Answer

    Solution

    As sides 20, 21 & 29 is a Pythagoras triplet means 202 + 212 = 292 ; this is a right angle triangle. So area of this triangle = 1/2 × base × height = (1/2) × 20 × 21 = 210 cm 2

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