Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 14 - Graph Theory - Chapter 14 Test - Page 939: 18


This graph is not a tree because it has a circuit.

Work Step by Step

A tree is a graph that is connected and does not have any circuits. This graph is connected. However, the edges CD, CE, and DE make a circuit. This graph has a circuit. Therefore, this graph is not a tree.
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