A polyhedron is a 3-dimensional shape with sides that are polygons. A prism is a polyhedron with two parallel and congruent faces called bases.

Interactive exercise. Assistance may be required. Click on the image. It will open a new window or tab in your browser. Read the introductory text, then scroll down to the animation toward the bottom of the web page. Study each prism by using the arrows to rotate the prism. Also, observe what happens as the net is folded to create the prism.

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Source: Geometry 3D Shapes-Prisms, Learner.org


Interactive exercise. Assistance may be required. Use the information presented in the above interactive sketch to help you fill in the chart below. Move the correct net and number to the appropriate space.

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What relationships do you notice among the number of faces, edges, and vertices for prisms?

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Possible Response

The number of edges of the base is equal to the number of lateral faces.

The number of faces is 2 more than the number of lateral faces.

The number of vertices is 2 times the number of edges of the base.

The number of edges on the prism is 3 times the number of edges of the base.

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Interactive exercise. Assistance may be required. Drag the answer listed at the top to its corresponding question below.