1. Area of Trapezoid

2. base 1 – bottom or top of figure base 2 – bottom or top of figure h h h b b
base 1 – bottom or top of figure
base 2 – bottom or top of figure
height – vertical distance between the two bases
Area is always measured in square units. (units²)
To calculate the area of a trapezoid, use the formula: A = (b₁ + b₂)h 2

3. A = (b₁ + b₂)h 2 = (4 + 2)3 = (6)3 = 9 ft²
Ms. Brown is planting a garden in the shape of a trapezoid. The lengths of the bases are 4 ft and 2 ft. The height of the garden is 3 ft. Find the area of the garden.
A = (b₁ + b₂)h 2 = (4 + 2)3 = (6)3 = 9 ft²

4. A = (b₁ + b₂)h 2 140 = (7 + b)10 280 = (7 + b)10 280 = 70 + 10b -70 -70 210 = 10b 10 10 b = 21 cm
Given the area, height, and a base of a trapezoid, find the length of the other base. A = 140 cm² h = 10 cm b = 7 cm b = ? cm