Trigonometry 7th Edition

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

Chapter 3 - Test - Page 172: 20

Answer

$r=4$ cm

Work Step by Step

The formula $s=r\theta$ requires the angles to be in radius. Hence here: $s=r\theta\\\pi=r(\pi/4)\\r=4$
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