- A260
- B145
- C115
- D130
Step-by-Step Solution
Sum of the three exterior angles (one at each vertex) of a triangle = 360°. Third = 360 - 110 - 120 = 130°.
Answer: D) 130
The exterior angles at two different vertices of a triangle are 110° and 120°. Find the exterior angle at the third vertex.
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