circles and ovals
In 3-D, spheres and oblate spheroids
sphere, cylinder and a cone
Cylinders
A cone
A cylinder. Also, howsabout a hemisphere ?
Yes they are made out of 12 curved shapes (ellipses) called gores.
A cylinder has two parallel congruent faces and a curved surface.
Cylinder
sphere, cylinder and a cone
That will depend on what they are but in general 3D shapes have surface area and volume whereas 2D shapes have only surface area.
Cylinders
A cone
A cylinder
cone
A cylinder. Also, howsabout a hemisphere ?
Yes they are made out of 12 curved shapes (ellipses) called gores.
A solid with a curved surface is a sphere. Spheres are three-dimensional shapes where every point on the surface is equidistant from the center. Other examples of solids with curved surfaces include cylinders and cones, which have curved sides but flat bases. These shapes differ in their properties and dimensions but share the characteristic of having curves in their surfaces.
its a lens...1 curved edge = a circle, 1 flat surface = back, 1 curved surface = front. (these are used in some battery-less flashlights, as an example.)