Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 2 - Reasoning and Proof - Chapter Test - Page 133: 10


The statement is not a good definition because it is not reversible.

Work Step by Step

The reverse is: Angles that form a straight line are supplementary. This statement is true for adjacent angles, but non-adjacent angles could also form a straight line and would not be supplementary.
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