A regular decagon will have 5 pairs of parallel sides, however, irregular decagons can have no parallel sides.
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A decagon has 10 sides. Any regular polygon with four or more sides will have pairs of sides that are parallel. A decagon will have 5 pairs of parallel sides.
10, A decagon has a maximum of five pairs of perpendicular lines, and a maximum of 5 parallel lines. however, this isn't in black and white it can have no pairs of line either perpendicular or parallel. know write the answer clearly
A rhombus has 2 pairs of parallel lines.
A regular dodecagon has six pairs of parallel lines.
A regular octagon has four pairs of parallel lines.