You need at least 4 faces for a pyramid. That type is known as Tetrahedron (http:/en.wikipedia.org/wiki/Tetrahedron)
Chat with our AI personalities
yes
5
Not true. They have only one base and several (3 or more) lateral triangular faces. A pyramid has a single vertex over a base - there are no parallel faces in any pyramid.
A pyramid
It depends on the shape of the base, but yes it has at least 3 triangular faces!(yes)