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G = 180 - exterior angle = 180 - 140 = 40
D = 6 O
Sum of all angles = 180
D + G+ O = 180
6O + 40 + O = 180
7O = 140
O=20

Therefore, the correct answer is A
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Bunuel
In Triangle DOG, angle D is six times as large as angle O. The exterior angle at G is 140 degrees. How many degrees are in angle O?

A. 20
B. 40
C. 100
D. 120
E. 140

eG = 140 => G = 40

D+O+G=180
=>6O+O+40 = 180
=> 7O = 140
=> O = 20

OA: A
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