Answer
$m∠B$ = $46^{\circ}$
Work Step by Step
we know sum of all three angles of triangle is $180^{\circ}$
$m∠A+m∠B+m∠C$=$180^{\circ}$
$67^{\circ}+m\angle B+67^{\circ}$ = $180^{\circ}$
$m∠B$= $180^{\circ}−134^{\circ}$
$m∠B$ = $46^{\circ}$
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
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 105: 3
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