Concrete Representations of Geometric Concepts

Concrete Representations ofGeometric Concepts National Council of Teachers of Mathematics 2007 Annual Meeting and Exposition Atlanta, Georgia -- March 22, 2007 Dr. Nancy F. Matthews Montgomery Central Middle School -- Cunningham, TN nancy.matthews@cmcss.net Kay D. Haralson Austin Peay State University -- Clarksville, TN haralsonk@apsu.edu

Do These Nets form Cubes? For each net, write your prediction on the net. Cut out the net and fold. Did it make a cube? Were your predictions correct? Sort the nets into cubes and not cubes. Write a generalization for predicting which nets make cubes.

Test your generalization on the following nets. Predict, then cut and fold.

Do These Nets form Triangular Prisms? For each net, write your prediction on the net. Cut out the net and fold. Did it make a Triangular Prism? Were your predictions correct? Sort the nets into Triangular Prisms and not Triangular Prisms. Write a generalization for predicting which nets make Triangular Prisms.

Do These Nets form Prisms? For each net, write your prediction on the net. Cut out the net and fold. Did it make a Triangular Prism? Were your predictions correct? Sort the nets into Prisms and not Prisms. Write a generalization for predicting which nets make Prisms.

Do These Nets form Pyramids? For each net, write your prediction on the net. Cut out the net and fold. Did it make a pyramid? Were your predictions correct? Sort the nets into pyramids and not pyramids. Write a generalization for predicting which nets make pyramids.

1. The net below is folded to form a cube.2. Predict how the other 2 sides be labeled when placed as shown?3. Be sure the letters are in the correct orientation.4. Cut the net and fold to form a cube. 5. Were your predictions correct?

Concrete Representations of Geometric Concepts