having a custom winter cover made at a cost of $12 per square meter. What is the total cost of the cover? 6 m 9 m 9 m Objective 4: Find the Perimeter and Area of a Trapezoid 39) Write two forms of the formula for the area of a trapezoid. 40) How do you know which sides of the trapezoid are the bases? Find the perimeter and area of each trapezoid. 41) 8 cm 10 cm 12 cm 9 cm 18 cm 42) 16 m 13 m 12 m 13 m 23 m 43) 18 yd 18 yd 19 yd 22 yd 16 yd 44) 96 mm 95 mm 117 mm 208 mm 93 mm 45) 46) 4 ft 3 4 6 in. 1 7 ft 5 ft 1 2 2 ft 1 2 5 ft 1 4 4 7 in. 1 2 9 in. 1 2 11 in. 3 4 Find the perimeter and area of each parallelogram. 29) 30) 7 ft 9 in. 6 ft 13 ft 13 ft 9 in. 5 in. 31) 32) 8 cm 3 cm 7 cm 11 yd 10 yd 13 yd 33) 2 ft 1 8 2 ft 3 4 1 ft 1 2 34) 11 yd 7 yd 5 yd 1 2 35) A parallelogram with no right angles always, sometimes, or never has two acute angles and two obtuse angles. 36) In your own words, explain why the rectangle and the parallelogram below have the same area. 14 cm 6 cm 16 cm 16 cm 6 cm Solve each problem. 37) Husna will sew together pieces of fabric shaped as parallelograms to make a comforter. Each piece will have the shape shown here. What is the total area of the comforter if she uses 160 pieces? 2 in. 1 4 in. 1 2 3 in. 4 1 2 38) Maarten has a swimming pool shaped as the parallelogram shown in the fi gure. For the winter months, he is www.mhhe.com/messersmith SECTION 4.2 Rectangles, Squares, Parallelograms, and Trapezoids 305
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