Answer
$\angle 3$ is at an angle of elevation from the horizontal line. The angle is at an elevation from point $A$ to point $D$.
Work Step by Step
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Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 8 - Right Triangles and Trigonometry - 8-4 Angles of Elevation and Depression - Lesson Check - Page 518: 3
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