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: 13

Answer

m$\angle 1$ = $122^{\circ}$ m$\angle 2=58^{\circ}$ m$\angle 5= 72^{\circ}$

Work Step by Step

m$\angle 1$= m$\angle 3+m\angle 4$ m$\angle 1$ = $ 50^{\circ}+72^{\circ}$ m$\angle 1$ = $122^{\circ}$ m$\angle 2=180^{\circ}-m\angle 1$ m$\angle 2=180^{\circ}-122^{\circ}$ m$\angle 2=58^{\circ}$ m$\angle 5 = m\angle 4$ alternate interior angles m$\angle 5= 72^{\circ}$
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