triangular pyramid
The shape you are describing is a triangular pyramid. A triangular pyramid has a base that is a triangle and three triangular faces that meet at a single point called the apex. The base of the pyramid is a rectangle, which is a quadrilateral with four right angles. The triangular faces of the pyramid connect the vertices of the base to the apex.
Tetrahedron
a triangular pyramid has 4 triangular sides
4 the base and 3 sides
A triangular based pyramid has only 4 faces.
triangular pyramid
A rectangular pyramid has 5 faces: a rectangular base, and 4 triangular faces.
A triangular pyramid has 4 faces and has 6 edges
A Rectangular Pyramid.
The triangular pyramid has.
rectangular pyramid
A triangular based pyramid has 4 faces and 4 vertices
A tetrahedron or triangular pyramid.
triangular pyramid
It is a triangular based pyramid
A triangular pyramid.