Question

define quadrilateral ?​

Answer 1

A polygon made up of 4 line segments is known as quadrilateral.

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Answer 2

In Euclidean plane geometry, a quadrilateral is a polygon with four edges and four vertices. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon and hexagon, or 4-gon for consistency with k-gons for arbitrary values of k