Answer:
15 units²
Explanation:
The figure is a trapezoid, whose area (A) is calculated as
A = h (b₁ + b₂ )
where h is the perpendicular height and b₁, b₂ the parallel bases
Here h = 3 , b₁ = 3, b₂ = 7 , then
A = × 3 × (3 + 7) = 1.5 × 10 = 15 units²
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h (b₁ + b₂ ) × 3 × (3 + 7) = 1.5 × 10 = 15 units²