Diagonal

Revision as of 11:13, 13 July 2006 by JBL (talk | contribs)

This article is a stub. Help us out by expanding it.

A diagonal of a polygon is any segment joining two vertices other than a side.

Triangles have no diagonals while convex quadrilaterals have two interior diagonals and concave quadrilaterals have on interior and one exterior diagonal.