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In Fig., AB, CD and EF are three lines concurrent at O. Find the value of y. |
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Answer» ∠AOE = ∠BOF = 5y (Vertically opposite angles) Also, ∠COE + ∠AOE + ∠AOD = 180° So, 2y + 5y + 2y = 180° or, 9y = 180°, which gives y = 20°. |
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