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2 A trapezoid is a quadrilateral with one pair of parallel sides. To find the area of a trapezoid you use the following formula: A = (b 1 + b 2 )h 2

3 2 Label the parts of the trapezoid to match the formula. b1b1 h b2b2

4 When you add (base 1 + base 2 ) it doubles the size of the trapezoid. b 1 = base 1 A = (b 1 + b 2 )h 2 b 2 = base 2 h = height base 1 base 2 base 1 base 2 b1b1 b2b2

5 A = (b 1 + b 2 )h 2 b 1 = 5 m b 2 = 8 m h = 4 m Find the area of the trapezoid. b 1 = 5 m b 2 = 8 m A = (5 + 8)4 2 A = (13)4 2 A = 52 2 A = 26 m² b 1 + b 2

6 A = (b 1 + b 2 )h 2 b 1 = 3 cm h Find the area of the trapezoid. b1b1 b2b2 A = (3 + 8)5 2 A = (11)5 2 A = 55 2 A = 27.5 cm² b 2 = 8 cm b2b2 b1b1 h = 5 cm b 1 + b 2

7 A = (b 1 + b 2 )h 2 h = 3 km Find the area of the trapezoid. b 1 = 2 km A = (2 + 6)3 2 A = (8)3 2 A = 24 2 A = 12 km² b 2 = 6 km b1b1 b2b2 h b 1 + b 2 b1b1 b2b2

8 A = (b 1 + b 2 )h 2 h = 13 mm Find the area of the trapezoid. b 1 = 34 mm A = ( )13 2 A = (50)13 2 A = A = 325 mm² b 2 = 16 mm b1b1 b2b2 h b 1 + b 2 b1b1 b2b2