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WAEC Mathematics 2017 Question 39

Question 39

Mensuration of Plane Shapes

The diagonal of a square is 60 cm. Calculate its perimeter.

  1. A.20√2
  2. B.40√2
  3. C.90√2
  4. D.120√2
Show the answer and explanation

Answer: D (120√2)

Explanation

Side = 60/√2 = 30√2 cm, so the perimeter = 4 × 30√2 = 120√2 cm.