There are many such shapes: a sphere, ellipsoid, toroid all have no flat faces.
Any one of the intersected by one plane will have one flat face, if intersected by two planes, there will be two and so on.
Amongst polyhedra, only a tetrahedron (or triangular prism) fas fewer than 5 flat faces.
A tetrahedron has four faces and six edges.
A shape that has fewer than 8 faces and fewer than 10 edges is a triangular prism. A triangular prism has 5 faces (2 triangular faces and 3 rectangular faces) and 9 edges. It meets the criteria of having fewer than 8 faces and fewer than 10 edges.
A shape in fewer than 3 dimensions.A shape with one or more curved faces or edges.
Hexahedron
octahedron
A dodecahedron
Prism.
4
Sphere is the answer.
yea
A polyhedron is in a subclass of geometric solids. The difference is that a polyhedron must have flat faces and straight edges.
A solid parallelogram figure w/6 flat surfaces that are called faces. All the faces are rectagles.