Answer
$A$ = 3099.6 cm$^{2}$
Work Step by Step
Area of a Trapezoid: $A$ = $\frac{1}{2}$$h$($b$ + $B$)
Therefore:
$A$ = $\frac{1}{2}$(42 cm)(61.4 cm + 86.2 cm)
$A$ = $\frac{1}{2}$(42 cm)(147.6 cm)
$A$ = (21 cm)(147.6 cm)
$A$ = 3099.6 cm$^{2}$
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 8 - Geometry - 8.4 Parallelograms and Trapezoids - 8.4 Exercises - Page 560: 13
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