17 edges
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A hexagonal prism has 18 edges and 12 vertices.
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.)
There is no such shape since there are no triangler surfaces - there is no such word! You might like to spell check your question before posting it! The correct word is triangular. And, incidentally, the answer to the question is a triangular prism - NOT a TRIANGLER prism!
15 edges.