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3 pairs of parallel lines (2 dimensional) : regular hexagon.3 pairs of parallel faces (3 dimensional) : cube or rectangular prism (also known as cuboid)
3 pairs of parallel lines (2 dimensional) : regular hexagon.3 pairs of parallel faces (3 dimensional) : cube or rectangular prism (also known as cuboid)
A rectangular prism has three pairs of parallel lines. The top and bottom faces are parallel to each other, the front and back faces are parallel, and the two side faces are parallel. This makes a total of three pairs of parallel lines in a rectangular prism.
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Assume there are no lines through a given point that is parallel to a given line or assume that there are many lines through a given point that are parallel to a given line. There exist a line l and a point P not on l such that either there is no line m parallel to l through P or there are two distinct lines m and n parallel to l through P.