Question

Two angle 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.

68.8
68.8

78.8
78.8

88.8
88.8

98.8
98.8

Answer 1

Use the Triangle Inequality Theorem (see picture above) to solve the problem.
Two Sides of a triangle measure 11 and 3. Identify the side measure that would NOT create a triangle.

7
7

9
9

12
12

13
13