A diagram is usually a twodimensional display which communicates using visual relationships. It is a simplified and structured visual representation of concepts, ideas, constructions, relations, statistical data, anatomy etc. It may be used for all aspects of human activities to explain or illustrate a topic.A Venn diagram is a diagram that shows the logical relation between sets. They were popularised by John Venn in the 1880s, and are now widely used. They are used to teach elementary set theory, and to illustrate simple set relationships in probability, logic, statistics, linguistics and computer science. A Venn diagram uses closed curves drawn on a plane to represent sets. Very often, these curves are circles …
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