A 3D shape with all triangular faces can be a tetrahedron pyramid.
Yes.
Triangular Prism
There can be no closed 3D shape with only one square and 3 triangles.
Sometimes because a sphere which is a 3d figure has a diameter
a pyramid
A pyramid.
A triangular pyramid. It has triangles on its 3 sides and a triangle on the bottom for a base.
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.
A 3D shape with all triangular faces can be a tetrahedron pyramid.
Yes.
Triangular Prism
There can be no closed 3D shape with only one square and 3 triangles.
An octahedron.An octahedron.An octahedron.An octahedron.
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A tetrahedron has four equilateral triangles as sides
Sometimes because a sphere which is a 3d figure has a diameter