Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 2 - Section 2.4 - The Angles of a Triangle - Exercises - Page 98: 36



Work Step by Step

m$\angle$Plane=65-37=28$^{\circ}$ m$\angle$Plane+m$\angle$T+m$\angle$R=180 28+37+m$\angle$R=180 m$\angle$R=115$^{\circ}$
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