O is the centre of the circle PQRS. PR and QS intersect at T POR…

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Mathematics WAEC 1997

O is the centre of the circle PQRS. PR and QS intersect at T POR is a diameter, ∠PQT = 42o and ∠QTR = 64o; Find ∠QRT

  • 68o checkmark
  • 64o
  • 42o
  • 32o
  • 22o.

The correct answer is: A

Explanation

TQR = 90 - 42 = 48o
QRT = 180 - (64 - 48)
    = 180 - 112
    = 68o
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