Vertex Returns the vertex of a parabola or polygon. Syntax vertex(Parabola) vertex(Polygonal | Polygon, Integer) vertex(Triangle, Integer) Description vertex(Parabola) Given a parabola, returns its vertex. vertex(Polygonal | Polygon, Integer) Given a polygonal or polygon and an integer , returns its -th vertex. vertex(Triangle, Integer) Given a triangle and an integer , returns its -th vertex. Related functions Parabola, Polygon, Polygonal, Triangle Table of Contents Syntax Description Related functions