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Which quadric surface is shaped like a saddle?

parabolic cylinder

elliptic paraboloid

hyperbolic paraboloid

elliptic hyperboloid

The widely sold fried snack food Pringles potato chips resemble a truncated hyperbolic paraboloid. The distinctive shape of these chips allows them to be stacked in sturdy tubular containers, fulfilling a design goal that they break less easily than other types of chip.

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wikimedia wikipedia → Paraboloid

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