Mathematics ACT Aspire Practice Test 2025 – Complete Study Resource

A prism is defined as a three-dimensional shape that has two parallel faces called bases, which are congruent shapes, and rectangular lateral faces connecting the corresponding sides of the bases. In this case, the question is asking for a type of prism that specifically has triangular bases.

The correct answer, a prism with triangular bases, is known as a triangular prism. This means that both of the bases of the prism are triangles, which distinguishes it from other types of prisms. For instance, in a square prism, the bases are squares, and in a cubic prism, the bases are also squares but all sides are equal, resulting in a cube. A cylinder, while it has circular bases, doesn't qualify as a prism since its lateral faces are curved rather than flat.

Thus, identifying the triangular prism as the correct answer is based on the defined characteristics of prisms and the specific requirements of the question regarding the shape of the bases.