In the diagram above, PQ//RS. The size of the angle marked x is?

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Mathematics JAMB 2008

In the diagram above, PQ//RS. The size of the angle marked x is?

  • 100o
  • 80o checkmark
  • 50o
  • 30o

The correct answer is: B

Explanation

Exterior angle = sum of two interior opposite angles
y = 50° (vert. opp ∠s are equal)
X = y + 30
X = 50 + 30
X = 80°

There is an explanation video available .

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