Final answer:
A figure with 2 triangular faces and 3 rectangular faces is called a triangular prism, which is a three-dimensional polyhedron.
Step-by-step explanation:
The figure that has 2 triangular faces and 3 rectangular faces is known as a triangular prism. The triangular prism is a type of polyhedron and is included in the family of prisms. Each of the triangular faces are congruent and are known as the bases of the prism. The rectangular faces are perpendicular to the triangular bases and connect them. If you can imagine a triangle being stretched into the third dimension, it would have rectangular sides, and the resulting shape is a triangular prism.