Answer
The angle is 1 radian.
Work Step by Step
The area of a sector is
$A = 0.5 \times R^2 \times a$
where R is the radius, and a is the central angle in radians.
lets use the equation:
$8 = 0.5 \times 4^2 \times a$
$8 = 8 a$
$a = 1$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 6 - The Circular Functions and Their Graphs - 6.1 Radian Measures - 6.1 Exercises - Page 573: 9
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