Geometry: Common Core (15th Edition)

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

Chapter 2 - Reasoning and Proof - 2-3 Biconditionals and Definitions - Practice and Problem-Solving Exercises - Page 102: 31

Answer

no

Work Step by Step

The statement is not a good definition because it is not reversible. The reverse would be written as, "An angle with a measure greater than 90 is an obtuse angle." The reverse is not true. An example is an angle measuring 200. (Obtuse angles measure between 90 and 180.)
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