#### 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:
$8 = 0.5 \times 4^2 \times a$
$8 = 8 a$
$a = 1$

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

The angle is 1 radian.

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