Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 3 - Section 3.5 - Inequalities in a Triangle - Exercises - Page 159: 25


In order to do this problem, we simply have to add up the two angles that compose each larger angle. Since angle ABC and CBD are larger than angle DBE and EDF, respectively, this means that ABC plus CBD is greater than DBE plus EDF. Thus, ABD is greater than DBF.
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