Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 4 - Section 4.1 - Angles and Radian Measure - Exercise Set: 6

Answer

right angle

Work Step by Step

$\frac{\pi}{2}$ is 90 °, so according to the definition, it is a right angle.
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