In the diagram, O is the centre. If PQ//RS and ∠ONS = 140°, find the...
MATHEMATICS
WAEC 2015
In the diagram, O is the centre. If PQ//RS and ∠ONS = 140°, find the size of ∠POM.
- A. 40°
- B. 50°
- C. 60°
- D. 80°
Correct Answer: A. 40°
Explanation
In the diagram above,
∠MNO = 140° and angles on a straight line is 180°
: ∠NMO = (180 - 140)° = 40°
Hence; ∠POM = 40° ( alternate angle ∠S)
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