Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 2 - Section 2.4 - The Angles of a Triangle - Exercises - Page 107: 40


m$\angle$A=36$^{\circ}$ m$\angle$B=36$^{\circ}$ m$\angle$C=108$^{\circ}$

Work Step by Step

m$\angle$C=3m$\angle$A m$\angle$A=m$\angle$B m$\angle$A+m$\angle$B+m$\angle$C=180 m$\angle$+m$\angle$A+3m$\angle$=180 5m$\angle$A=180 m$\angle$A=36$^{\circ}$ m$\angle$B=36$^{\circ}$ m$\angle$C=3m$\angle$A=108$^{\circ}$
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