Maths

A polygon is a shape formed from three or more points joined by three or more straight lines, The points are known as vertices (each point is a vertex), and the lines are called sides—the name of most polygons relates to the number of angles or sides it has.

Venn diagrams AVenn diagram shows the relationship between sets. In a Venn diagram, a set is ‘usually represented by a circle, and the universal set by a rectangle. Elements of a· set are often represented ·by points in the circle. Each part of the diagram .is labeled and the parts being considered are shaded.