Editing Quadrilateral (section)

==Special line segments==
The two [[diagonal]]s of a convex quadrilateral are the [[line segment]]s that connect opposite vertices.

The two '''bimedians''' of a convex quadrilateral are the line segments that connect the midpoints of opposite sides.<ref>{{cite web |author=E.W. Weisstein |title=Bimedian |url=http://mathworld.wolfram.com/Bimedian.html |publisher=MathWorld – A Wolfram Web Resource}}</ref> They intersect at the "vertex centroid" of the quadrilateral (see {{Section link||Remarkable points and lines in a convex quadrilateral}} below).

The four '''maltitudes''' of a convex quadrilateral are the perpendiculars to a side—through the midpoint of the opposite side.<ref>{{cite web |author=E.W. Weisstein |title=Maltitude |url=http://mathworld.wolfram.com/Maltitude.html |publisher=MathWorld – A Wolfram Web Resource}}</ref>