What Is a 4-Sided Polygon Called?

By Staff WriterLast Updated Apr 7, 2020 12:55:58 PM ET
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A four-sided polygon is known as a quadrilateral. There are various types of quadrilaterals, but the most recognized are the square, rectangle, rhombus, trapezoid and the parallelogram. Quadrilaterals are always flat shapes that have four straight edges and four corners or vertices.