A triangular prism.
A triangular prism would fit the given description
A triangular prism or a cuboid as it seems would fit the given description
triangular prism
A pyramid
They are prisms.
A triangular prism. In adition to the three lateral faces, it has a triangulat top and bottom.
A triangular prism would fit the given description
A triangular prism or a cuboid as it seems would fit the given description
triangular prism
A pyramid
It is a prism.
A rectangular prism.
They are prisms.
A triangular prism. :)
a triangular base pyramid
not a pyramid!! well a triangular won't but still pyramids have 4 flat surfaces.
A triangular prism would fit the given description