1.

In a triangle ABC, if $ \angle\ A+\angle\ C$=140 degree and $ \angle\ A+3\angle\ B$ =180 degree then $ \angle\ A$ is equal to1). $80^{0}$2). $40^{0}$3). $60^{0}$4). $20^{0}$

Answer» RIGHT ANSWER is $60^{0}$


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