The minimum numbers of congruent faces are as follows: On an equilateral triangular prism: one pair of triangles On a right equilateral triangular prism: one pair of triangles and one triplet of rectangles.
Six ^>^* * * * *A triangular prism has only five faces so the above answer is clearly nonsense. It need have only two [traingular] faces that are congruent. The remaining, rectangular faces need...