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UI Post-UTME Mathematics 2017 (Model questions) Question 24

Question 24

Triangles and Quadrilaterals

If the angles of a quadrilateral are (3y + 10)°, (2y + 30)°, (y + 20)° and 4y°, find the value of y

  1. A.66°
  2. B.12°
  3. C.30°
  4. D.42°
Show the answer and explanation

Answer: C (30°)

Explanation

10y + 60 = 360, so y = 30.