Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 3 - Section 3.5 - Inequalities in a Triangle - Exercises - Page 167: 28

Answer

1. We are told that DC is congruent to AB. 2. EC has length greater than 0 (given). 3. DE equals EC plus DC. 4. Thus, DE is longer than DC. 5. Since DC is congruent to AB, if DE is longer than DC, then DE is longer than AB. 6. DE is longer than AB.
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