Rectangles: Perimeter and Area
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The area of a rectangle is the product of its length and width.
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Contributed by: Sarah Lichtblau (March 2011)
Open content licensed under CC BY-NC-SA
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"Rectangles: Perimeter and Area"
http://demonstrations.wolfram.com/RectanglesPerimeterAndArea/
Wolfram Demonstrations Project
Published: March 7 2011