Question on: JAMB Mathematics - 2008
In the diagram above, PQ//Rs. The size of the angle marked x is
A
100o
B
80o
C
50o
D
30o
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Correct Option: B
Exterior angle = sum of two interior opposite angles
y = 50o (vert. opp ∠s are equal)
X = y + 30
X = 50 + 30
X = 80o
y = 50o (vert. opp ∠s are equal)
X = y + 30
X = 50 + 30
X = 80o
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