Area of a trapezoid
This lesson will show how we find the area of a trapezoid by using the formula you see below the trapezoid
Example #1:
If b
_{1} = 7 cm, b
_{2} = 21 cm, and h = 2 cm, find A
(b
_{1} + b
_{2})/2 = (7 + 21)/2 = 28/2 = 14
A= 14 × 2 = 28 cm
Example #2:
If b
_{1} = 15 cm, b
_{2} = 25 cm, and h = 10 cm, find A
(b
_{1} + b
_{2})/2 = (15 + 25)/2 = 40/2 = 20
A= 20 × 10 = 200 cm
Example #3:
If b
_{1} = 9 cm, b
_{2} = 15 cm, and h = 2 cm, find A
(b
_{1} + b
_{2})/2 = (9 + 15)/2 = 24/2 = 12
A= 12 × 2 = 24 cm
Area of a trapezoid quiz to find out if you really understand this lesson.
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Jul 28, 17 02:38 PM
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