In this lesson, we will look at the formula used to calculate the area of a trapezoid. You will learn it with the help of
some examples and practice questions with solution, and watching video as well as
explanations by the instructor.
You know from earlier learning that a trapezoid is a 4-sided figure with one pair of parallel sides. To find the area of a trapezoid; take
the sum of its bases, multiply the sum by the height of the trapezoid, and then divide the
result by 2.
(More text below video...)
(Continued from above)
Here the height is the length of segment drawn perpendicular to the base from an opposite vertex. If h is the height and b1 and
b2 are bases of a trapezoid, then its area is: 1/2 x height x (Sum of
bases) i.e. = 1/2 x h x (b1 + b2). For example, if height
of a trapezoid is 8 inches and bases of trapezoid measure 13 and 15 inches, the
area is given by = 1/2 x 8 x (13 + 15) which works out to 112 inches2.
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