MAIN IDEA Build three-dimensional figures given the top, side, and front views. New Vocabulary three-dimensional figure face edge lateral face vertex (vertices) prism base pyramid cone cylinder sphere center Math Online glencoe.com • Extra Examples • Personal Tutor • Self-Check Quiz Key Concept Prisms and Pyramids Figure Properties Prism • Has at least three lateral faces that are parallelograms. • The top and bottom faces, called the bases, are congruent parallel polygons. • The shape of the base tells the name of the prism. Rectangular prism Square prism or cube Pyramid • Has at least three lateral faces that are triangles. • Has only one base, which is a polygon. • The shape of the base tells the name of the pyramid. Triangular pyramid Square pyramid 11-7 Study the shape of each common object below. Then compare and contrast the properties of each object. Many common shapes are three-dimensional figures. That is, they have length, width, and depth (or height). Some terms associated with three-dimensional figures are shown below. A face is a flat surface. The sides are called lateral faces. The edges are the segments formed by intersecting faces. The edges intersect at the vertices. Two types of three-dimensional figures are prisms and pyramids. See Ch. 11 Answer Appendix. See Ch. 11 Answer Appendix. Three-Dimensional Figures Lesson 11-7 Three-Dimensional Figures 603 603_0603_0606_CH11_L7_874046 603 603_0603_0606_CH11_L7_874046 603 9/26/07 7:36:55 PM 9/26/07 7:36:55 PM
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MAIN IDEABuild three-dimensional figures given the top, side, and front views.
Prisms and Pyramids Prisms and Pyramids Prisms and pyramids are examples of polyhedra, or solids with flat surfaces that are polygonal regions. Cones, cylinders, and spheres are not examples of polyhedra.
Three-Dimensional Figures Three-Dimensional Figures In three-dimensional figures, dashed lines are used to indicate edges that are hidden from view.