A doughnut with a [radial] slice cut out of it.
A sphere sliced by two parallel planes.
mmewiji
cylinder
A prism has no curved surfaces. It has 5 or more flat faces.
A face, of a solid object, is a flat surface. If it is curved it is called a curved surface though sometimes it is also referred to as a face. Two faces meet at an edge, which is a line which may be straight or curved. Three or more faces meet at a point which is a vertex.
A shape in fewer than 3 dimensions.A shape with one or more curved faces or edges.
There are infinitely many. For example, any sphere, ellipsoid, cone, toroid, cordoid etc that is intersected by one or more planes.
There are a few families of polyhedra with identical faces. There are none whose faces have 6 or more sides. There is no special name for polyhedra whose faces are pentagons or pentagrams. A dodecahedron is an example. If coplanar faces are disallowed, the only polyhedron with quadrilateral faces are the cube and rhombohedron. There are infinitely many polyhedra with equilateral triangular faces: the tetrahedron, octahedron and icosahedron are examples.
In a 3-dimensional shape with polygonal faces, an edge is a straight line at which two faces meet. A vertex is a point where three or more edges meet. In solid shapes which are not polyhedra, an edge is still a line - possibly curved - where two faces meet. But a vertex can be any corner, for example, the point of a cone.
A solid figure that has some of the same faces but some different faces, and has one more face than the other, is a prism and a pyramid. A prism has two identical bases and rectangular or square faces, while a pyramid has a polygonal base and triangular faces that meet at a single point, called the apex. The prism has one more face than the pyramid.
A cylinder, yep. Actually lots of other things too, depending on what you call a single curved side. Any two (non-intersecting) planes through a sphere make a "fat cylinder." Think of others, there's more.
Regular object have equla sides and irregular dont
It has 3 more triangular faces than square faces