In the diagram PQRS is a circle, |PT| = |QT| and ∠QPT = 70o what…

Mathematics WAEC 2005

In the diagram PQRS is a circle, |PT| = |QT| and ∠QPT = 70o what is the size of ∠PRS?

  • 40o
  • 70o checkmark
  • 80o
  • 140o

The correct answer is: B

Explanation

∠QPT = ∠QTP = 70o. Since ∠QTR = 140o
∠PRS = TSR = 1/2(180-40) = 70o
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