In fact, thinking about cube shapes can only take us
so far, because, aside from the square-shaped one,
the hot tub range isn’t made out of cubes.
OK—stop right there! I don’t know
how closely you’ve looked but I
don’t see any hot tubs that look like
they’re made out of CUBES.
How do the hot tubs compare to a cube?
Like a cube, all the hot tubs have a uniform depth. They
also have straight sides at a right angle to the base. But for
most of the shapes of hot tub, calculating the volume using
length × width × depth would give you the volume of a
box that you could fit the hot tub inside, not the water that
the hot tub would contain. It might be handy, but it’s not
what we’re looking for!
Same depth a
Volume of a hot tub = ? x depth
Length x width x depth is the
volume of the box that w
around the hot tub.
What tool from your Geometry
Toolbox could we use to calculate the
volume, instead of “length × width”?
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