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Across 3. The number of cubic units needed to fill a given space 5. A flat surface of a polyhedron 7. A three-dimensional figure in which all the surfaces or faces are polygons 9. A polyhedron that has two congruent, polygon-shaped bases and other faces that are all rectangles 11. A side of a polygon; a face of a three-dimensional figure by which the figure is measured or classified 12. The line segment along which two faces of a polyhedron intersect

Down 1. A three-dimensional figure with one vertex and one circular base 2. The sum of the areas of the faces, or surfaces, of a three-dimensional figure 4. A three-dimensional figure with two parallel, congruent circular bases connected by a curved lateral surface 6. On an angle or polygon, the point where two sides intersect 7. A polyhedron with a polygon base and triangular sides what all meet at a common vertex 8. The number of square units needed to cover a given surface 10. An arrangement of two-dimensional figures that can be folded to form a polyhedron