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A quadrilateral is a four-sided polygon characterized by having four edges and four vertices. Common types of quadrilaterals include squares, rectangles, trapezoids, and parallelograms, each with unique properties regarding side lengths and angles. The sum of the interior angles of any quadrilateral is always 360 degrees. Quadrilaterals can be either convex, where all angles are less than 180 degrees, or concave, where at least one angle is greater than 180 degrees.

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2w ago

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