There can be no closed 3D shape with only one square and 3 triangles.
The simplest such shape is PYRAMID.
square based pyramid
Yes.
Yes. for example to make a pyramid, you need 4 triangles and a square
There can be no closed 3D shape with only one square and 3 triangles.
Square pyramid
A Triangular Pyramid has 4 triangles and 1 square.
The simplest such shape is PYRAMID.
An octagonal pyramid has eight triangles on an octagonal base. An octahedron can also be made by putting a square pyramid on another inverted square pyramid. This shape has just eight triangles and no others.
square based pyramid
Yes.
Yes. for example to make a pyramid, you need 4 triangles and a square
Triangular Prism
is a square a 3d shape
A 3D shape with all triangular faces can be a tetrahedron pyramid.
It is a square based pyramid. And the word is which, not witch!