A pyramid has 1 square base.
is a square a 3d shape
The simplest such shape is PYRAMID.
There can be no closed 3D shape with only one square and 3 triangles.
A 3D shape could be:a square pyramida cubea rectangular block
A pyramid (3D)! Some examples: - triangular base pyramid - square base pyramid - rectangular base pyramid - cone
A square base pyramid
A square based pyramid is one possibility.
A square based pyramid.
square base pyramid
If the base of the pyramid is square, it must have four triangular vertical faces in order to meet at the apex (top). Such a 3D shape is a "square pyramid".