1. 5-3 Inequalities in One Triangle 5-4 Indirect proof 5-5 The triangle Inequality 5-6 Inequality in two triangles. Chapter 5

2. Summary (5-1, 5-2) Summary page 339

3. Inequalities in One Triangle p. 344

4. Inequalities in One Triangle Exterior angle inequality The measure of an exterior angle of a triangle is greater than the measure of either of its corresponding remote interior angles. Angle-side relationships in triangles If one side of a triangle is longer than another side, then the angle opposite the longer side has a greater measure than the angle opposite the sorter side. If one angle of a triangle has a greater measure than another angle, then the side opposite the greater angle is longer than the side opposite the lesser angle. Theorem 5.9 page 346Theorem 5.10 page 346 Theorem 5.8 page 345

5. Indirect proof p. 355 Indirect proofs can be used: To prove algebraic concepts (Example 2 page 356) In everyday situations (Example 3 page 356) To prove concepts in number theory (Example 4 page 357)

6. Indirect proof p. 355 Example 2 page 356. Geometry book.

7. The Triangle Inequality p. 364

8. The Triangle Inequality p. 364

9. Inequality in Two Triangles p. 371

10. Classwork From Workbook Practice 5-3 Problems 1 to 12, Practice 5-4 Problems 1 and 2, Practice 5-5 Problems 1 to 12, Practice 5-6 Problems 1 to 4.