Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 1 - Section 1.1 - Angles, Degrees, and Special Triangles - 1.1 Problem Set - Page 11: 17


α = $60^{\circ}$

Work Step by Step

$\angle A = 30^{\circ}$ (given) $\angle ADC = 90^{\circ}$ $\angle α = 180^{\circ}$ - (90$^{\circ}$ + 30$^{\circ}$) (angle sum of triangle is 180$^{\circ}$) = 60$^{\circ}$
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.