Area of a Trapezoid
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Trapezoid
Quadrilateral (4 sides)
1 pair of parallel sides (bases)
2 nonparallel sides ­ not used in formula
Remember ­ height must form a 900 angle with the base!
Example:
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Area of a trapezoid = ½h(b1+b2)
Examples:
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1.)
A = ______________
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8
3
2.)
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Area = ___________
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6
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3.) If the height of a trapezoid is 7 inches, and the bases are 7 and 17 inches, find the area of the trapezoid. show your work.
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4.) The area of a trapezoid is 84 in2, and the bases are 7 in and 17 in. Find the height. Show your work.
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5.) The area of a trapezoid is 55 square mile. One base is 6 miles and the height is 5 miles. Find the length of the 2nd base of the trapezoid. show your work.
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Homework
p. 143 ­ 145
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