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WAEC Mathematics 2001 Question 40

Question 40

Triangles and Quadrilaterals

Which of the following pairs of triangles is/are similar?

Diagram for this question
  1. A.II only
  2. B.III only
  3. C.I and III only
  4. D.II and III only
Show the answer and explanation

Answer: B (III only)

Explanation

In III every side of the larger triangle is 4 times the smaller (5.2, 7.2, 8.4 against 1.3, 1.8, 2.1). In I, 4.2 is not twice 2.6, and the sides in II are not in one ratio.