Special Line Segments
The two diagonals of a convex quadrilateral are the line segments that connect opposite vertices.
The two bimedians of a convex quadrilateral are the line segments that connect the midpoints of opposite sides. They intersect at the "vertex centroid" of the quadrilateral (see Remarkable points below).
The four maltitudes of a convex quadrilateral are the perpendiculars to a side through the midpoint of the opposite side.
Read more about this topic: Quadrilateral
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