Question

what is quadrilateral​

Answer 1

Answer:

A quadrilateral is a closed plane figure with four sides(edges) and four vertices(corners). The sum of the interior angles of a quadrilateral is 360degree.

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Answer 2

Answer:

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