Chapter 9

 Sun Space Charlie is helping his family design a sun porch for their house. It will be in the shape of a trapezoid (ABCD), allowing for large windows on several sides. Charlie has labeled the four corners A, B, C, and D. He wants to find out how many 12-inch-square floor tiles he should order if 2 dozen extra tiles are needed for replacements or cutting errors. The tiles come in boxes of 12 tiles per box. Following is information about the dimensions of the sun porch. Line BC is 20 feet long and runs along the living room. Line AB is 8 feet long and is perpendicular to line BC. Line CD is parallel to line AB but is twice as long as line AB. Line AD represents the longest wall with the most windows. Line AE is an imaginary line parallel to line BC. Point E is on line CD. It is the midpoint of line CD. How many boxes of floor tiles should Charlie order?

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