Answer:
16.5 square units
Explanation:
area(trapezoid) = ((b1 + b2) / 2)(h)
base 1: 9
base 2: 3
height: 3
area = ((9 + 3) / 2)(3)
area = (11/2)(3)
area = (5.5)(3)
area = 16.5
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