median
don steward
mathematics teaching 10 ~ 16

Friday, 28 July 2017

cuboid with a shell

the difference (i.e. volume of the shell)
between a cuboid (with 3 consecutive numbers as the dimensions) and
another cuboid where the dimensions are all 1 unit bigger

a 2 by 3 by 4 cuboid
with a shell around it









the difference is always 6 times a square number


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