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A triangular based pyramid has no parallel lines but it does have 4 faces, 6 edges and 4 vertices.
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Two pairs.
A square based pyramid has 8 edges: One for each side of the square, and one from each corner of the square going up to the point.
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A triangular based pyramid has no parallel lines but it does have 4 faces, 6 edges and 4 vertices.
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Two pairs.
A square based pyramid has 8 edges: One for each side of the square, and one from each corner of the square going up to the point.
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Eight.
Depending upon the base, it will either have no parallel sides or up to (number of sides ÷ 2) sets of 2 parallel lines. The number of angles depends upon the base and is 3 × (base + 1).
None but it has 4 faces, 6 edges and 4 vertices
An octagon had four pairs of parallel lines.
A triangle can have no parallel lines.
None because a tetrahedron is a triangular based pyramid with 4 faces, 6 edges and 4 vertices