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I'm a teaching assistant in a grade 4-6 class and work with children with behavior and learning difficulties. The class is currently working on geometry, specifically 3D shapes and their attributes. The teacher says a face is a base but a base is not a face. With a square/rectangular or cube prism, the base and face is easily explained but not so a triangular prism. What is the difference between a base and a face on the shapes?
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