Problems 1-4
You should be able to state the Sum of the Measures of the Angles in a Triangle result from memory.

Problems 5-10
See Example 1.

Problems 11-16
See Example 2. Remember that the sum of the measures of a triangle is 180°.

Problems 17-22
See Example 4. Remember that the exterior angle of a triangle equals the sum of the measures of the two opposite interior angles.

Problems 23-28
See Figure 5.42, and the material next to it in the text.

Problems 29-34
See Example 3.

Problems 35-42
These problems are testing your knowledge of the terminology of triangles which is discussed at the beginning of this section.

Problems 43-52
See Example 3.

Problems 53-56
See Figure 5.42, and the material next to it in the text.

Problem 57
This problems is an application of the property that the sum of the measures of a triangle are 180°

Problem 58
This problem is an extension of this idea to a quadrilateral.

Note: Homework Hints are given only for the levels 1 and 2 problems. You can also check some sources for homework help on the Internet (see Links, below), or you can call the author at (707) 829-0606 or send an e-mail to: smithkjs@mathnature.com