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8-71.

Find the area of each trapezoid below.

  1. A trapezoid with horizontal parallel bases: bottom is 13 cm, and top is 4 cm. A dashed line, labeled 8 cm, perpendicular to both bases, connects the bases.

Here is how Sheila started the problem:

Finish her work.

  1. A trapezoid with horizontal parallel bases: bottom is 21 mm, and top is 16 mm. The right non parallel leg, which is perpendicular to both bases, is 11 mm.

See part (a).

square mm