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 Areas Rectangle A rectangle is a four-sided polygon with four right angles, whose opposite sides are parallel and are equal. A rectangle is a particular sort of parallelogram, but can't say that all parallelograms would be rectangles, because a rectangle is a shape where opposites sides are parallel and all the corners are 90 degree angles. Some parallelograms would be rectangles, but not all. Area of a rectangle The area of a rectangle is the product of its width and length. $Area=width\;\cdot\;length\;\;\;\;\;\;,\;that\;is\;\;A=b\;\cdot\;h$ Find the area of the rectangle where: Its width and lenght are consecutive odd number (width is the lowest). The lenght is: 37Area=