Difference of Cubes

If a cube is put into the corner of a larger cube, the region between them can be split up into three boxes of the same width. That region can also be split up into three congruent truncated pyramids (frustums). If the inside cube is put into the middle of the larger cube, the region between them can be split up into six congruent square frustums.
The volume of a frustum is , where is the height and and are the areas of the base and top.

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Related Curriculum Standards

US Common Core State Standards, Mathematics