None - each of the faces (including the bas) is a triangle - triangles do not have any parallel lines.
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A triangular prism has 9 parallel lines
Three.
Each of the nine edges have another edge running parallel to them.
There are 9 edges. It has three edges which are parallel to each other (along the length of the prism) AND it has three pairs of parallel edges - at the top and bottom of the prism.
One pair because opposite cross-section faces are parallel to each other.