Answer
$r\theta$, $\frac{1}{2}r^2\theta$.
Work Step by Step
The formula for calculating the length of an arc is $s=r\theta$ and the area of the sector is given by $A=\frac{1}{2}r^2\theta$.
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 5 - Trigonometric Functions - Section 5.1 Angles and Their Measures - 5.1 Assess Your Understanding - Page 385: 6
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