In the diagram, PQ||SR. Find the value of Z
MATHEMATICS
WAEC 1998
In the diagram, PQ||SR. Find the value of Z
- A. 30°
- B. 40°
- C. 45°
- D. 90°
Correct Answer: D. 90°
Explanation
Given PQ//SR
x = 45º
y = 45º
z = ?
Sum of angles in a triangle = 180º
(x + y + z)º = 180º
(45 + 45 + z)º = 180º
90º + zº = 180º
z = (180 - 90)º
z = 90º
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