Answer:
A = 18 cm²
Explanation:
The area (A) of a trapezium is calculated as
A = h (b₁ + b₂ )
where h is the perpendicular height and b₁, b₂ the parallel bases )
Here h= 3, b₁ = 3 and b₂ = 9 , then
A = × 3 × (3 + 9)
= 1.5 × 12
= 18 cm²
18 units^2
There are two trianges each with a base of 3 and a height of 3, making each 4.5 units^2 and together, 9. Add the area of the triangles with the square to get 18.
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h (b₁ + b₂ ) × 3 × (3 + 9)