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A pie chart is useful for showing how a set is a composite of many differently sized parts. As an example, teachers often introduce pie charts by having a classroom full of students (the set) identify some attribute of themselves (favorite food, month born, etc.) and document it with a pie chart. For such an example, specify the number of students in your class in the form below so that the sudents can build their pie chart by coloring in the slices that make up each part.