Answer:
40
Explanation:
From triangle law ,
66 + x +49 + x+83 = 180
or, 198 + 2x = 180
or, 2x = 180 -198
or, 2x = -18
hence, x = - 9
Now angle A = x + 49
= (-9) + 49
= 40
Hence, answer is 40.
Since , internal sum of angle of triangle is 180°
So,
Hence measure of angle A is 40°.
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