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Published byAlannah Hubbard Modified over 9 years ago

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Area of Trapezoids

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A trapezoid can be thought of as half of a parallelogram also. Notice that when we put the 2 trapezoids together we get a parallelogram. We use the bottom of one trapezoid and the top of the other to make the base of the parallelogram. Notice that we still need to use the height of the parallelogram as well.

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Base 1 Base 2 height

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10 m 22 m 25 m A = (h)(b 1 + b 2 ) ÷ 2 A = (25)(10 + 22) ÷ 2 A = (25)(32) ÷ 2 A = (800) ÷ 2 A = 400 m²

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AREA OF A TRAPEZOID WordsNumbersFormula Trapezoid: The area of a trapezoid is one- half the height h times the sum of the base lengths b 1 and b 2. A = (2)(3 + 7) = 10 units 2 1212 A = (h)(b 1 + b 2 ) 1212 A = (h)(b 1 + b 2 ) ÷ 2

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Use the figure to find the following measurements. 1. The perimeter of the triangle 2. The perimeter of the trapezoid 3. The perimeter of the combined figure 4. The area of the triangle 5. The area of the trapezoid 36 cm 44 cm 54 cm 2 64 cm 104 cm 2

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Use the figure to find the following measurements. 1. The perimeter of the 2. The perimeter of the 3. The perimeter of the 4. The area of the 5. The area of the

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