Mathematics
WAEC 2005
In the diagram PQRS is a circle, |PT| = |QT| and ∠QPT = 70
o what is the size of ∠PRS?
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A.
40o
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B.
70o
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C.
80o
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D.
140o
Correct Answer: Option B
Explanation
∠QPT = ∠QTP = 70o. Since ∠QTR = 140o
∠PRS = TSR = 1/2(180-40) = 70o
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