In the figure (not drawn to scale), AGB,CGD and EGF are straight lines. Find ∠y.
A
97∘
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B
127∘
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C
100∘
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D
117∘
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Solution
The correct option is A117∘ ∠CGE+∠EGB+∠BGD=180∘ (Angles on a straight line) ∴25∘+∠EGB+38∘=180∘ ∠EGB=180∘−(25∘+38∘)=180∘−63∘=117∘ And ∠y=∠EGB (vertically opposite angles) ∴∠y=117∘.