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This Java applet enables students to form and rotate three-dimensional rectangular and triangular prisms and observe how changing the height, width, and depth affects volume and surface area. Functionality includes color selection, slide bars for dimensions, and check boxes for imposing or making the back faces visible. From the applet page, What, How, and Why buttons open pages explaining the activity's purpose, function, and how the mathematics fits into the curriculum. The pages also link to the NCTM geometry standard for grades 6-8. Supplemental resources include a lesson plan, exploration questions, and a worksheet. Copyright 2005 Eisenhower National Clearinghouse
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