Two.
A hexahedron is a solid with six plane faces, and a cuboid is a six-sided figure each face of which is a rectangle.
A polyhedron (solid shape formed by plane faces) with four faces is called a tetrahedron.
By its very nature of being a triangle, and a 2D shape, a triangle cannot have four plane faces. However, a tetrahedron is a polyhedron made up of four triangular faces.
An octahedron has 8 sides.An octahedron is a polyhedron with eight plane faces.
A pentagonal prism, a hexagonal pyramid, a cube with one vertex (corner) cut off, a tetrahedron with three vertices cut off - these are some of the possibilities.
The faces of a cylinder are circles.
A cyliner has 2 parallel plane faces and 1 curved face
The following are some examples of a shape with two flat face and one curved surface: A sphere intersected by two planes. An ellipsoid intersected by two plane faces. A paraboloid intersected by two plane faces. A cone intersected by two plane faces. A cylinder. A hyperboloid intersected by two plane faces.
With Spore.
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Pentagonal Prism
The official definition for the word crystals is a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces."
If they are plane faces the shape is likely to be a polyhedron.
It has 1 edge, 2 faces (one curved and one plane), and 1 vertex.It has 1 edge, 2 faces (one curved and one plane), and 1 vertex.It has 1 edge, 2 faces (one curved and one plane), and 1 vertex.It has 1 edge, 2 faces (one curved and one plane), and 1 vertex.
A plane. * * * * * A plane has no edges. It is infinite in extent.
Two.