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A triangular based pyramid has zero pairs of parallel faces. In a triangular based pyramid, all three faces of the base are not parallel to the apex, which means there are no pairs of parallel faces in this type of shape.
I think a triangular pyramid.
None. A triangle based pyramid is a 4-sided solid (a tetrahedron), and has no parallel sides.
A triangular pyramid has four faces and 2 pairs.
In a triangular based pyramid, the three faces that form the base are perpendicular to the apex of the pyramid, which means they have pairs of perpendicular sides. The other three faces, which are triangular, do not have pairs of perpendicular sides.