... are straight lines where two planar surfaces meet.
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A triangular prism has 6 vertices and 9 edges.
In all 9 edges are present. (3 edges at the triangular base of prism and 3 edges on the opposite triangular face. And, 3 edges connect the two faces of prism.)
Cube: 12Triangular prism: 9Difference: 3A cube has 12 edges.A triangular prism has 9 edges.The cube has 3 more edges than the triangular prism.
9
A triangular prism has 9 edges, 5 faces and 6 vertices.