Two angles of a triangle measure 39.5° and 61.7°. Using the Triangle Angle Sum Theorem, which states that the sum of the inside angles of all triangles must equal 180°, find the measure of the third angle. (2 points)
To find the measure of the third angle, we can use the Triangle Angle Sum Theorem:
Let x be the measure of the third angle.
39.5° + 61.7° + x = 180°
101.2° + x = 180°
Subtract 101.2° from both sides:
x = 78.8°
Therefore, the measure of the third angle is 78.8°.