Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 1 - Trigonometric Functions - Section 1.2 Angle Relationships and Similar Triangles - 1.2 Exercises: 21


22° 29'34"

Work Step by Step

1. Interior angles of triangle add up to 180 degrees. To find one of the interior angles just subtract two interior angles from 180 degrees. $x=180^{\circ}-51^{\circ}20'14"-106^{\circ}10'12"=22^{\circ}29'34"$
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