3 A polyhedron is a three-dimensional object with flat surfaces, called faces, that are polygons. When two faces of a three-dimensional figure share a side, they form an edge. A point at which three or more edges meet is a vertex (plural: vertices).
4 Identify the number of faces, edges, and vertices on each three-dimensional figure.
5 Identify the number of faces, edges, and vertices on each three-dimensional figure.
6 A prism is a polyhedron with two congruent, parallel bases, and other faces that are all parallelograms. A prism is named for the shape of its bases. A cylinder also has two congruent, parallel bases, but bases of a cylinder are circular. A cylinder is not a polyhedron because not every surface is a polygon.
7 A pyramid has one polygon-shaped base and three or more triangular faces that share a vertex. A pyramid is named for the shape of its base. A cone has a circular base and a curved surface that comes to a point. A sphere has no base and one curved surface. All points on the surface are the same distance from a point called the center of the sphere.
8 Name the three-dimensional figure The figure represents a cylinder.
9 Name the three-dimensional figure represented by the object. The figure is a rectangular prism.
10 Name the three-dimensional figure represented by the object. The figure is a square pyramid.
11 Lesson Quiz1. Identify the number of faces, edges, and vertices in the figure shown.Identify the figure described.2. two congruent circular faces connected by a curved surface3. one flat circular face and a curved lateral surface that comes to a point8 faces, 18 edges, and 12 verticescylindercone
12 Lesson Quiz for Student Response Systems 2. Identify the figure described. A square base with four triangles that come to a point.A. square prismB. square pyramidC. rectangular prismD. rectangular pyramid
13 Lesson Quiz for Student Response Systems 3. Identify the figure described. A hexagonal base with six triangles that come to a point.A. hexagonal prismB. triangular prismC. hexagonal pyramidD. triangular pyramid