There can be no closed 3D shape with only one square and 3 triangles.
A triangular prism
I do not believe there is such a shape.I do not believe there is such a shape.I do not believe there is such a shape.I do not believe there is such a shape.
Triangular prism
It is a 3 dimensional shape
There is no 3D shape with 6 faces: 4 rectangles and 2 triangles. See the link for all forms of hexahedra.
it is called a triangular prism
you can make a square based pyramid using 4 triangles and a 1 square
square based prism?
It doesn't exist. The least number of sides for a 3-D shape only made of triangles is 4.
A triangular pyramid. It has triangles on its 3 sides and a triangle on the bottom for a base.
a shape that is in 3D
Triangles!