Letters that make vertex
e, r, t, v, x are letters that make 'vertex'
2 possible definitions for 'vertex'
Under this definition, vertex is a noun and has the following properties:
'vertex' can be a type of extreme point, extremum, extreme.
apical is a derivative of vertex.
Under this definition, vertex is a noun and has the following properties:
'vertex' can be a type of intersection, intersection point, point of intersection.