Website gives a general overview of different types of quadrilaterals and how to identify them. Explains the properties of different quadrilaterals.
Math.com
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In this Early Edge video lesson, you'll learn more about Quadrilaterals, so you can be successful when you take on high-school Math & Geometry.
The Princeton Review
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Formula and description of the perimeter of a square.
Math Open Reference
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Definiton and properties of the diagonals of a square
Math Open Reference
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Area of a square. Definition and formula
Math Open Reference
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Definition and properties of a square. Describes how it can be considered a special case of other types of quadrilateral. Links to other related topics, including the area of a square.
Math Open Reference
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Formula and description of the perimeter of a rhombus.
Math Open Reference
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Formula for the area of a rhombus
Math Open Reference
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Formula and description of the perimeter of a rectangle.
Math Open Reference
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Definition and properties of the Golden Rectangle
Math Open Reference
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