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Solid Shapes with Curved Surfaces

Sphere - a sphere is a three-dimensional analogue of a disk. The boundary of a sphere is a three-dimensional closed curved surface such that every point on the surface is equidistant from the center

Ellipsoid - the three-dimensional analogue of an ellipse, it can be thought of as a sphere that has been squished or stretched in one or two directions. If two of the three axes have equal length it is called a spheroid. See Ellipsoid Surface Area Formula.

Cone - a cone has a circular base that tapers linearly to a point, called the apex. If the tip is sliced off, the resulting shape is called a conical frustum.

Cylinder - a cylinder has two circular bases of equal size at the ends, and a middle section that can be formed by rolling a rectangle into a tube. It is the standard shape for canned foods. A conical frustum is like a cylinder except that the circular ends are different sizes.

Barrel - like a cylinder, both ends of a barrel are circles of equal size. But unlike a cylinder, its sides do not go straight up and down, but rather bulge outward in the middle.

Torus - a torus is the technical mathematical term for a doughnut or bagel shape.

Dome - a dome is any solid shape that has a flat base and a curved surface connecting the boundary of the base. A hemisphere (sphere cut in two) is a type of dome, as is a spherical cap.

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4. He felt his feet hit solid ground, and stood, shaking, as the blurred shapes around him came suddenly into focus.
5. He wheeled his trolley forward cautiously until it was right against the barrier and pushed with all his might. The metal remained solid.
6. Moody’s wand was still pointing directly at Harry’s heart. Over his shoulder, foggy shapes were moving in the Foe-Glass on the wall.
7. She waved her wand, and the werewolf sprang to his feet, but appeared too wary to approach her. He prowled behind an armchair, his filthy curved nails clutching its back.
8. So they hurried back into the dark, circular room; the ghostly shapes of the brains were now swimming before Harry’s eyes instead of the blue candle flames.
9. The right hand side of the stands, which was a solid block of scarlet, roared its approval.
10. What is the best definition of 'SSD' or 'solid state drive'?

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