Answer
m$\angle$R=115$^{\circ}$
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$^{\circ}$
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
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
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