Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 3 - Section 3.5 - Inequalities in a Triangle - Exercises - Page 172: 3



Work Step by Step

m$\angle$A is equal to 100$^{\circ}$ so it must be the largest angle in triangle ABD. Segment DB is across from $\angle$A so it is the largest side of triangle ABD and must be longer than segment AB.
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