Question

Two angles of a triangle measure 39.5 and 61.7 use the triangle angle sum THEOREN, to find the measure of the third angle do not round the answer
68.8
78.8
78
79

Answer 1

The sum of the three angles in a triangle is always 180 degrees.

So, the measure of the third angle would be:

180 - (39.5 + 61.7) = 78.8

Therefore, the measure of the third angle is 78.8 degrees.