Answer:
The answer to your question is: x = 45°
Explanation:
We must know that the sum of the internal angles in a triangles equals 180°.
Then ∠A + ∠B + ∠C = 180°
Substitution
55° + 80° + ∠C = 180°
135° + ∠C = 180° Simplification
∠C = 180 - 135
∠C = 45°
∠C = x
x = 45° Result