Find the a) perimeter and b) area of the parallelogram. Solution a) To fi nd the perimeter of the parallelogram, add the lengths of the sides. 10 cm 6 cm 10 cm 16 cm 16 cm P 16 cm 10 cm 16 cm 10 cm 52 cm The perimeter is 52 cm. (Notice that we did not need the height, 6 cm.) b) Area base height, so identify the base and height. Remember, the base is the side that forms the right angle with the height. b 16 cm h 6 cm (We do not need the 10 cm to fi nd the area.) A bh A (16 cm)(6 cm) Substitute the values. A 96 cm2 Multiply. The area of the parallelogram is 96 cm2. EXAMPLE 5 YOU TRY 5 Find the a) perimeter and b) area of the parallelogram. 10 13 9 ft 10 13 ft 13 9 ft 9 ft 9 ft 4 Find the Perimeter and Area of a Trapezoid Definition A trapezoid is a four-sided fi gure with exactly one pair of parallel sides. Here are some examples of trapezoids. B C A D 3 cm 5 cm 4 cm 6 cm 13 in. 8 in. 5 9 in. 10 BC 0 0 AD The sides of length (BC is parallel to AD) 6 cm and 3 cm are parallel. The sides of length 13 in. and 5 9 10 in. are parallel. The opposite sides of a trapezoid do not have to be the same length. 300 CHAPTER 4 Basic Geometry Concepts and Algebra www.mhhe.com/messersmith
messersmith_power_prealgebra_1e_ch4_7_10
To see the actual publication please follow the link above