Venn Diagram - A method for visualizing sets and their relationships., Sets - A collection of objects, numbers, or items that have a common property., Subset - A set containing only elements that are also found in a larger set., Null Set - Also called an Empty Set, has zero elements, Universal Set - A set which has elements of all the related sets, without any repetition of elements., Cardinality of Set - The number of elements in a set, Element - Any individual object, item, or number that belongs to that well-defined collection, Well-defined Set - A collection of objects where there's no ambiguity, Not a Subset - U = {1, 2, 3} B = {1, 2, 4, 5},

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