Answer:
The correct answer is 110°.
Explanation:
The Exterior Angle Theorem states, "the exterior angle of a triangle is equal to the sum of its non-adjacent angles".
This means we would add 50 + 60 to get 110°.
Or we could look at the exterior angle and the adjacent angle to it. The two angles form a supplementary angle - this equals 180°. To find our answer this way, we subtract the known angle form 180:
180 - 70 = 110°
Hope this helps,
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