They may be called lateral faces.
Faces
A Triangular Based Pyramid is a Pyramid which has triangular faces and a triangular base. It has 4 vertices, 6 sides, and 4 faces. A Triangular Based Pyramid is also called a Tetrahedron
The height of the triangular face of a pyramid is called the slant height.
Triangular Pyramid......... The faces are Triangular....
base
A triangular pyramid has four triangular faces.
There are four faces in a triangular pyramid.
The solid shape that has one square face and four triangular faces is called a pyramid. If you were to have a shape that had four triangular faces and no square face, it would be called a triangular pyramid.
A tetrahydron is a triangular pyramid having congruent equilateral triangles for each of its faces.
Each of them has four triangular faces.
In geometry, pyramid has many forms such as rectangular pyramid, trapezoidal pyramid, quadrilateral pyramid and even triangular pyramid. Triangular pyramid is a pyramid with triangular base and can be called as a tetrahedron if each of its faces has congruent equilateral triangles.
A cube has 6 faces and a triangular pyramid has 5 faces. So a cube has 1 more face than a triangular prism. But a triangular pyramid has four faces. You make the call. That is correct: A triangular prism has five faces, and a cube has six faces, but a triangular pyramid has four faces.
the trianagular pyramid has 5 faces the triangular prism has 6 faces