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Part of a geometric figure regarded as the bottom
Also known as base of a prism · base of a triangle · base of a trapezoid · base of a cone · base of a frustum · base of a cylinder
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5 identifiers linking base across the web's reference databases
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In geometry, a base is a side of a polygon or a face of a polyhedron, particularly one oriented perpendicular to the direction in which height is measured, or on what is considered to be the "bottom" of the figure. This term is commonly applied in plane geometry to triangles, parallelograms, trapezoids, and in solid geometry to cylinders, cones, pyramids, parallelepipeds, prisms, and frustums.