In the diagram PQ and MN are straight lines. Find the value of x

  • A 13o
  • B 17o
  • C 28o
  • D 30o
waec 2005mathematics

The correct answer is B. 17o

The straight line MN = 180 = 2(x+30o) + 86o =>

180 = 2x + 60o + 86o => 180o = 2x + 146o => 2x = 180 - 46 = 34o => x = 34/2 = 17o

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