1. Their consistent saddle shape is mathematically known as a hyperbolic paraboloid . 2. The axis of rotation becomes the axis of the paraboloid . 3. Devices for constructing such paraboloids are known as rotating furnaces. 4. All of this supports the identification of this as a hyperbolic paraboloid . 5. The hyperbolic paraboloid structure was removed when the Denver Pavilions facility was constructed. 6. The same technique is used to make solid paraboloids , in rotating furnaces. 7. The hyperbolic paraboloid and the hyperboloid of one sheet are doubly ruled surfaces. 8. Compared with a single paraboloid , using two partial troughs has important advantages. 9. The polyurethane quickly spreads out in the shape of a paraboloid , then hardens. 10. The widely sold fried snack food Pringles potato crisps resemble a truncated hyperbolic paraboloid .
