Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 9 - Section 9.3 - Area, Volume, and Surface Area - Exercise Set: 20

Answer

$T=82$ square km.

Work Step by Step

The area of this figure can be calculated as the sum of the area of the rectangle and the area of the trapezoid on the top. $T=T_1+T_2$ Rectangle: $T_1=a\times b$ $T_1=10\times5=50$ square km. Trapezoid: $T_2=h\times \frac{a+c}{2}=4\times \frac{6+10}{2}=4\times 8=32$ square km $T=T_1+T_2=50+32=82$ square km.
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