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| The area of a figure is the amount of surface it covers. We measure area in square units. |
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| a side of a polygon; a face of a three-dimensional figure by which the figure is measured or classified. |
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| a cone has a circular base and and a curved surface that comes to a point. A cone is not a polyhedron because not every face is a polygon. |
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| a three-dimensional figure with two parallel, congruent circular bases connected by a curved lateral surface. |
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| the line segment along which two faces of a polyhedron intersect. |
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| a flat surface of a polyhedron |
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| a net is the pattern made when the surface of a three-dimensional figure is layed out flat showing each face of the figure. |
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| a three-dimensional figure in which all the surfaces or faces are polygons. |
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| a prism is a polyhedron with two congruent, parallel bases, and other faces that are all parallelograms. |
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| a polyhedron with a polygon base and triangular sides that all meet at a common vertex. |
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| the sum of the areas of the faces, or surfaces, of a three-dimensional figure. |
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| a point at which three or more edges of a polyhedron meet (plural = vertices) |
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| the number of cubic units needed to fill a given space. |
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