<P> In Euclidean plane geometry , a quadrilateral is a polygon with four edges ( or sides ) and four vertices or corners . Sometimes , the term quadrangle is used , by analogy with triangle , and sometimes tetragon for consistency with pentagon ( 5 - sided ) , hexagon ( 6 - sided ) and so on . </P>
<P> In Euclidean plane geometry , a quadrilateral is a polygon with four edges ( or sides ) and four vertices or corners . Sometimes , the term quadrangle is used , by analogy with triangle , and sometimes tetragon for consistency with pentagon ( 5 - sided ) , hexagon ( 6 - sided ) and so on . </P>
polygon with four right angles and four side with the same length
polygon with four right angles and four side with the same length
quadrilateral
quadrilateral