Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 3 - Section 3.3 - Isosceles Triangles - Exercises - Page 147: 41c

Answer

m$\angle$A=40$^{\circ}$

Work Step by Step

m$\angle$ABR=m$\angle$A m$\angle$ABR+m$\angle$A+m$\angle$ARB=180 2m$\angle$A+100=180 m$\angle$A=40$^{\circ}$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.