It could be a right irregular tetrehedron with an equilateral triangular base.
I dont know the answer............................
The faces of a cube are all the same shape - a square.
Opposite faces.
a triangular prism easy
A regular tetrahedron (triangular pyramid).
3d shape Well actually it is a Cube
Imagine a pyramid, with a triangle shaped base, with three sides coming up each of which is a triangle. That is a tetrahedron (4 sides, all the same side, with each one the shape of a triangle). * * * * * Mostly correct, but the four faces need not all be the same.
Shape
a triangular pyramid.
Shapes have sides. Do you mean, what shape has 6 sides or, what solid has 6 faces?
cone
yes