Homework due 01/20/09

The theorems you proved in the assignment in class today are commonly referred to as the “midpoint theorems.” Use the results of these theorems as well as other theorems you have learned before and do exercises 1, 3, 4, 5, 15 and 22 on pages 177-179 of your textbook. Then, read pages 179-180 and fill in the missing reasons (stated as “Why?”) in the proof for Theorem 30. Be sure to read and understand the definition and corollary that follow from it.