2005
Mathematics
JAMB
In the diagram above calculate the value of x
A.
60°
B.
100°
C.
120°
D.
140°
Correct Answer: 120°
Explanation
p + 40° = 100° (exterior ∠ = sum of two interior opp ∠s) p = 100° - 40° P = 60° But q + p = 180° (∠s on a straight line) q + 60° q = 180° - 60° q = 120° x = q (corresponding ∠) ∴x = 120°
p + 40° = 100° (exterior ∠ = sum of two interior opp ∠s) p = 100° - 40° P = 60° But q + p = 180° (∠s on a straight line) q + 60° q = 180° - 60° q = 120° x = q (corresponding ∠) ∴x = 120°THIS WEEK's
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