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Chapter 12 : Surface Area and Volume
Games

To play, click on the desired block with your mouse, or move the cursor with your ARROW KEYS. When the block is highlighted, type your letter. To switch from across to down or vice versa use the ARROW KEYS or Control-CLICK with your mouse. To clear the puzzle, click on your browser's REFRESH or RELOAD button. After clicking "Check Answers", incorrect letters will be marked with an "X". Your teacher has access to the completed puzzle.

 Across 1. A solid that is bounded by polygons, called faces, that enclose a single region of space. 2. A cone with a vertex that lies directly above the center of the base. 5. A plane figure that meets the following two conditions. (1) It is formed by three or more segments called sides, such that no two sides with a common endpoint are collinear. (2) Each side intersects exactly two other sides, one at each endpoint. 7. A cylinder such that the segment joining the centers of the bases is perpendicular to the bases. 8. A prism whose lateral edges are not perpendicular to the bases. 11. A line segment formed by the intersection of two faces of a polyhedron. 12. The ratio of the lengths of two corresponding sides of two similar polygons. Down 1. Five regular polyhedra, named after the Greek mathematician and philosopher Plato, including a regular tetrahedron, a cube, a regular octahedron, a regular dodecahedron, and a regular icosahedron. 2. A prism whose lateral edges are perpendicular to both bases. 3. A solid with congruent circular bases that lie in parallel planes. 4. Half of a sphere, formed when a great circle separates a sphere into two congruent halves. 6. A polyhedron with two congruent faces, called bases, that lie in parallel planes. 9. The locus of points in space that are a given distance from a point, called the center. 10. A two-dimensional representation of all the faces of a polyhedron.