They are prisms.
The description given could fit that of a triangular prism.
were two or more faces of a solid figure
pyramid
Polygonal faces.
It is a prism.
They are prisms.
'Enneahedron' - a solid figure with nine faces
It is a prismoid - a prism-like solid whose lateral faces are not perpendicular to the bases.It is a prismoid - a prism-like solid whose lateral faces are not perpendicular to the bases.It is a prismoid - a prism-like solid whose lateral faces are not perpendicular to the bases.It is a prismoid - a prism-like solid whose lateral faces are not perpendicular to the bases.
The area of the polygonal base, and the areas of each of its lateral faces (which need not be equal).The area of the polygonal base, and the areas of each of its lateral faces (which need not be equal).The area of the polygonal base, and the areas of each of its lateral faces (which need not be equal).The area of the polygonal base, and the areas of each of its lateral faces (which need not be equal).
The description given could fit that of a triangular prism.
A solid figure with twenty faces is called an Icosahedron.
A triangular prism. In adition to the three lateral faces, it has a triangulat top and bottom.
A cone has a round base and a narrowing round top. I hope this answers your question!
were two or more faces of a solid figure
pyramid
a tetrahedron, an icosahedron or a pyramid