Tetrahedron
No.
a triangular pyramid.
Triangular Pyramid......... The faces are Triangular....
the base of a triangular pyramid is triangle
the base of a triangular pyramid is triangle
It is a triangular pyramid.It is a triangular pyramid.It is a triangular pyramid.It is a triangular pyramid.
a square * * * * * That would be a square pyramid! A triangular pyramid would have ... wait for it ... a TRIANGULAR base! Worth waiting for, wasn't it?
tetrahedron aka triangular pyramid
A regular tetrahedron (triangular pyramid).
A shape that has some triangular faces is a pyramid.
A pyramid.
Triangular Prism, Triangular Pyramid.