Define vertex

A point where two or more edges point is called a vertex. In simpler words it is the corners of the geometrical shape.

For example:

Consider the above rectangle: It has 4 vertices (plural of vertex). As it has 4 corners and at each corner two edges meet.

Similarly

• Cubes and cuboids have 8 vertices
• Cones have 1 vertex
• Cylinders have no vertex
• Spheres have no vertex (the surface is a curve)