A triangular prism has 6 vertices.
To explain further, a triangular prism is a three-dimensional geometric shape defined by two triangular bases that are parallel to each other, and three rectangular faces connecting the corresponding sides of the triangles. Each triangular base has 3 vertices, and since there are two bases, we add the vertices from both bases together: 3 (from the first triangle) + 3 (from the second triangle) = 6 vertices in total. This characteristic is what gives the triangular prism its unique shape within the family of prisms.