A triangular based pyramid has no parallel lines but it does have 4 faces, 6 edges and 4 vertices.
A triangular prism has 9 parallel lines
None because a tetrahedron is a triangular based pyramid with 4 faces, 6 edges and 4 vertices
None - each of the faces (including the bas) is a triangle - triangles do not have any parallel lines.
5
Yes. A square consists of two pairs of parallel lines!
A triangular prism has 9 parallel lines
None but it has 4 faces, 6 edges and 4 vertices
None because a tetrahedron is a triangular based pyramid with 4 faces, 6 edges and 4 vertices
It has 1 set of 3 parallel lines and 3 sets of 2 parallel lines, and 18 angles (3 sides meet at each vertex)
None - each of the faces (including the bas) is a triangle - triangles do not have any parallel lines.
5
Yes. A square consists of two pairs of parallel lines!
Yes, two lines that lie in parallel to the same line are always parallel to each other. This is based on the Transitive Property of Parallel Lines, which states that if line A is parallel to line B, and line B is parallel to line C, then line A is parallel to line C. Thus, if two lines are both parallel to a third line, they must be parallel to each other.
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24
Three pairs and one triplet. The triplet can be considered three pairs.
Two pairs.