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JAMB Mathematics 1982 Question 45

Question 45

Triangles and Quadrilaterals

A side of a rhombus is 2cm in length. An angle of the rhombus is 60°. What is the length of the diagonal facing this angle?

  1. A.2cm
  2. B.8cm
  3. C.4cm
  4. D.√2cm
  5. E.16cm.
Show the answer and explanation

Answer: A (2cm)

Explanation

The two 2cm sides with a 60° angle between them and the diagonal form an equilateral triangle, so the diagonal is 2cm.