Question

What is the value of x? Enter your answer in the box. x = °

Answer 1

Answer:

45

Step-by-step explanation:

All angles in a triangle add up to 180.

80 + 55 = 135

180 - 135 = 45

Answer 2

Answer:

The answer to your question is: x = 45°

Step-by-step 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