Pie Charts

A pie chart is a form of graph that uses a circular graph to display data. The graph’s parts are proportional to the percentage of the total in each group. In other words, the size of each slice of the pie is proportional to the size of the group as a whole. The full “pie” represents 100% of the whole whereas the pie “slices” represent sections of the whole.


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

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.