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Question

In figure, lines AB and CD intersect at O. If AOC+BOE=70o and BOD=40o, find BOE and reflex COE.

243964_c6783172938d4236acc4535685bcb8d2.png

A
COE=30o
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B
BOE=30o
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C
BOE=110o
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D
COE=110o
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Solution

The correct options are
B BOE=30o
D COE=110o
From figureAOC=BOD [Vertically opposite angles]
AOC=40o[BOD=40o is given]
Now, AOC+BOE=70o [Given]
40o+BOE=70o
BOE=30o
AOE+BOE=180o [Linear pair of angles]
AOE+30o=180o
AOE=150o
AOC+COE=150o
40o+COE=150o
COE=110o

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