Two angles of a triangle measure 39.5 degrees and 61.7 degrees. using the triangle sum theorem which states that the sum of the sum of the inside angles of all triangles equal 180 degrees, find the measure of the third angle.
To find the measure of the third angle, we can add the measures of the two given angles and subtract the sum from 180 degrees.
39.5 + 61.7 = 101.2
180 - 101.2 = 78.8
Therefore, the measure of the third angle is 78.8 degrees.