Finding the Third Angle in a Triangle

In a triangle, the three angles add up to 180 degrees. If one angle measures 50 degrees and another angle measures 70 degrees, what is the measure of the third angle?

Use the formula for the sum of angles in a triangle: $$A + B + C = 180$$, where $$A$$, $$B$$, and $$C$$ are the measures of the angles in the triangle.