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  3. A polygon with four sides and four right angles has one side of 6 mm. If the area of the polygon is 42 mm2, would the polygon be

A polygon with four sides and four right angles has one side of 6 mm. If the area of the polygon is 42 mm2, would the polygon be

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问题 A polygon with four sides and four right angles has one side of 6 mm. If the area of the polygon is 42 mm2, would the polygon be considered a square or a rectangle?
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答案42 mm2
解析 A square is a special kind of rectangle. All of its sides are equal in length. Since the area of a rectangle is area = 1 × w, the area of a square would be area = s2(side squared)because length and width are equal. For this problem, the given side is 6 mm. If the figure were a square, the area would be 36 mm2. However, the area is said to be 42 mm2. Therefore the shape is a rectangle and not a square.
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