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In the given figure, If AB || CD, EF ⊥ CD and ∠GED = 126º, find ∠AGE, ∠GEF and ∠FGE.
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Solution
It is given that,
AB || CD
EF ⊥ CD
∠GED = 126º
⇒ ∠GEF + ∠FED = 126º
⇒ ∠GEF + 90º = 126º
⇒ ∠GEF = 36º
∠AGE and ∠GED are alternate interior angles.
⇒ ∠AGE = ∠GED = 126º
However, ∠AGE + ∠FGE = 180º (Linear pair)
⇒ 126º + ∠FGE = 180º
⇒ ∠FGE = 180º − 126º = 54º
∴ ∠AGE = 126º, ∠GEF = 36º, ∠FGE = 54º
Concept: Lines Parallel to the Same Line
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