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 Everyday Examples
 Area of a Polygon:  A measurement of the region enclosed by the sides of a polygon. The area is always expressed in squared units.

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The total cost of tiling or carpeting a floor is based on the floor's area. Sale prices will be given in terms of square feet or square yards, which are units of area. A carpenter would determine his cost by measuring the dimensions of a room, calculating the area (often of a rectangle), and then multiplying the area by the unit area cost of the tiling or carpeting. For instance, suppose your rectangular room has dimensions of 5 feet by 6 feet, and carpeting costs $15 per square foot. Therefore, the area of your room is 30 square feet, resulting in a cost of 15*30 = $450 to carpet the room.