5
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Most people would consider the 2 triangular end faces as the bases and the 5 rectangular ones as lateral faces.
I think it has 2 base the answer is 5
A triangular prism has 5 faces, 9 edges and 6 vertices
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A triangular based prism has 6 vertices and 9 edges.
5
A triangular prism has 6 edges and so an octagonal prism will have 16 edges.
sphere: 0 edgescone: 1 edgerectangular prism: 8 edgescylinder: 0 edgestriangular prism:6 edgespentagonal prism: 10 edgestriangular-based pyramid: 4 edgessquare-based pyramid: 5 edges
A triangular prism has 9 edges!