pyramid
A pyramid
a triangular pyramid.
A regular tetrahedron (triangular pyramid).
A triangular-based pyramid
Pyramid
pyramid
A pyramid
A pyramid
Pyramid, but to be exact it would be a Triangular Pyramid ;) * * * * * To be exact ... but WRONG! A triangular pyramid has 4 faces and 4 vertices! A shape with 5 faces and vertices is a quadrilateral based pyramid - of which a special case would be a square based pyramid.
a triangular pyramid.
Pyramid
A triangular pyramid.
triangular pyramid
Square based pyramid and Triangular based pyramid * * * * * A square based pyramid has 5 faces!
A regular tetrahedron (triangular pyramid).
Pyramid