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A clear plastic prism has six faces, each of which is a parallelogram of side length 1 meter. A diagonal made of nylon filament line connecting two opposite vertices of the solid has a length of 4 meters. ls the solid a cube?

Answer 1

No the solid is not a cube.

If it were a cube, the diagonal of the base would be #sqrt2# (found using the Pythagorean theorem

#a^2 + b^2 = c^2#,

where #a# and #b# are both equal to #1# meter.

You now use a different right triangle to find the diagonal from opposite vertices, the diagonal of the base is #sqrt2#, the height is #1# (if it is a cube), and the hypotenuse is the diagonal from opposite vertices.

Again, use #a^2 + b^2 = c^2#

#1^2 + (sqrt2)^2 = 4^2#

#1 + 2 != 16#

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Answer 2

Autumn Armstrong

No, the solid is not a cube.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.