Practice and Problem-Solving Exercises

A Practice

See Problem 1.

Find the area of each trapezoid

11. 
12. 
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14. Find the area of a trapezoid with bases 12 cm and 18 cm and height 10 cm.
15. Find the area of a trapezoid with bases 2 ft and 3 ft and height 1 3  ft . 1 third , ft .
16. Geography The border of Tennessee resembles a trapezoid with bases 340 mi and 440 mi and height 110 mi. Estimate the area of Tennessee by finding the area of the trapezoid.

See Problem 2.

Find the area of each trapezoid. If your answer is not an integer, leave it in simplest radical form.

See Problem 3.

Find the area of each kite.

See Problem 4.

Find the area of each rhombus.

B Apply

26. Think About a Plan A trapezoid has two right angles, 12-m and 18-m bases, and an 8-m height. Sketch the trapezoid and find its perimeter and area.
    • Are the right angles consecutive or opposite angles?
    • How does knowing the height help you find the perimeter?

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