Geometry: Common Core (15th Edition)

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

Chapter 2 - Reasoning and Proof - 2-4 Deductive Reasoning - Apply What You've Learned - Page 112: e



Work Step by Step

d is directly to the left of c, so c is 1 more than d. $d+1=c$ subtract 1 from each side $d+1-1=c-1$ $d=c-1$
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