There are many possible answers but the most likely one, for your level, is a triangular prism.
A pyramid
A square pyramid
Each of them has four triangular faces.
Triangular based pyramid
None, because there can be no such thing as a triangular square. If it is triangular it cannot be a square, if it is a square it cannot be triangular.
A pyramid
A square pyramid
A 3-dimensional figure with 5 faces is a triangular prism. It consists of two triangular bases and three rectangular faces connecting the corresponding sides of the bases. The total number of faces in a triangular prism is 5.
a square pyramid (i found it in my sons math book !)
Triangular prism
A triangular prism.
A triangular prism.
A triangular prism has 2 triangular faces and 3 rectangular faces.
triangular pyramid
A triangular prism.
A Triangular Prism
Four triangular faces.