The area of a trapezoid is found using the formula
2), where, and b, are the parallel sides of the
trapezoid and his the height of the trapezoid. what is the area, in square kilometers, of a trapezoid with bases 5 km and
7 km and height 3 km?
a. 14.5
b. 18
c. 36
d. 52.5

B. 18

Step-by-step explanation:

Area of a trapezoid is  [(base 1 + base 2)*height]/2.

Area =[(5 + 7)*3]/2 = 12*3/2 = 18 km²

answer: -8.2562234e+13

step-by-step explanation:

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about the problem:

srry i'm not done ! i'll