Question

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)
Responses

68.8°
68.8°

78.8°
78.8°

88.8°
88.8°

98.8°
98.8°

Answer 1

180° - 39.5° - 61.7° = 78.8°

So, the measure of the third angle is 78.8°.