Find angle C of triangle ABC if angle A = 18 degrees and angle B = 49 degrees.

As we well know from the school curriculum in geometry, one of the properties of such a figure is that the sum of its angles will always equal 180 °.

Based on this property, we can determine what the value will equal the angle C, if from the condition of this problem we know for sure that the value of the angle A of this triangle is 18 °, while the value of the angle B is 49 °:

180 – 18 – 49 = 162 – 49 = 113.

Answer: With such initial conditions, the value of the angle C of the triangle ABC will be 113 °.