Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter P - Preliminary Concepts - P.3 - Informal Geometry and Measurement - Exercises P.3 - Page 23: 8

Answer

All measures except -15 degrees.

Work Step by Step

The measure of an angle must be between 0 and 360 degrees. Since negative 15 degrees is less than 0 degrees, it follows that all angles except the negative 15 degree angle are valid angle measures.
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