A cylinder
cube There are a great many solid shapes that have only flat surfaces.
Prism
a solid figure with five plane surfaces
A polyhedron
the flat surfaces of a solid figure are the
A SPHERE has no vertices and no FLAT surfaces
The solid figure that has 4 flat surfaces that are triangles is a tetrahedron. A tetrahedron is a polyhedron with four triangular faces, six straight edges, and four vertex corners. Each of the four faces of a tetrahedron is an equilateral triangle, making it a regular polyhedron.
The flat surface of a solid figure is called a face. For example, a rectangular prism has 6 flat surfaces and therefore 6 faces.
A cylinder
pentagon
cylinder
A cube
A face is the flat surface on a solid figure. For example, a triangular prism has five flat surfaces and therefore five faces.
circle
a triangular base pyramid
A rectangular prism.