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 104: 49

Answer

D

Work Step by Step

D is a good definition because it is both precise and reversible. A is not a good definition. Words like "usually" are not precise. B is not a good definition. Many types of figures are convex, so the definition is not reversible. C is not a good definition. Other shapes, such as ovals, have no corners, so the definition is not reversible.
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