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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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