A triangular prism has 5 faces.
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Triangular prism
number of edges of a n-sided (n>2) prism is 3n. In this case, 30.
A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges. 5, 9 and 6
20
28 We can check this using smaller prisims, with a triangular prism (3-sided) there are 6 vertices. WIth a rectangular prism (4-sided), there are 8 vertices. The number of vertices in a prism is always twice the number of sides.