The plural of vertex is vertices. The number of sides and vertices are the properties of a shape. Let’s look at the number of sides and vertices that some 2D shapes have. Here is a triangle.

Through a field called geometric topology, mathematicians like me study all possible spaces in all dimensions. Whether trying to design secure sensor networks, mine data or use origami to deploy ...

Discover how to work out the area of a 2D shape, by adding the length of its sides together. Perimeter on a grid Find out about perimeter, the distance around a 2D shape, and how to work it out on ...