100 Day Summer Challenge

100 problems in 100 days. #100problems

Day 66

66 of 100: Cutting Corners

Geometry Level 1

27 unit cubes are packed together to create this 3×3×33\times 3\times 3 cube. Each face of a unit cube has an area of 1.

If all 8 of the corner cubes are removed, by how much will the surface area of the figure increase?

Focus on just one of the corners.


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