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Surfaces can be graphed in GeoGebra by either using the Surface command, defining a function f (x, y), or inputting an equation of at most three variables. Some surfaces can be easily graphed using a function of two variables or an equation, but we have more control over the surface if the Surface command is used. We start by graphing surfaces of revolution encountered in single variable calculus class. A surface of revolution can be graphed in GeoGebra provided we can parameterize the circular cross-section. This method of graphing a surface of revolution can be applied to model objects with circular cross-section, like a Hershey's Kiss, in GeoGebra.
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