Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 7 - Similarity - Get Ready! - Page 429: 3

Answer

The answer is 70 by alternate interior angles.

Work Step by Step

Since you already know that angle 1 equals 70 degrees. Angle 3 will also equal 70 degrees because angle 1 and 3 are congruent by alternate interior angle.
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