It has 3 pairs of parallel sides
By the way parallel sides are sides that never intersect (meet or touch together)
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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
5 pairs of parallel sides * * * * * The above answer was written by someone who does not know the difference between a decagon (10 sides) and a dodecagon (12 sides). A dodecagon need not have any parallel sides. It can have 1, 2, 3, 4, 5 or 6 pairs. It can have 1, 2, 3 or 4 triplets; 1, 2 or 4 quartets or 2 sextets. It can also have combinations like 2 pairs and 1 triplet.
A quadrilateral has 4 sides, 2 in which never intersect. Therefore, the lines that don't intersect are called parallel. There are 4 parallel sides but has 2 pairs of parallel sides.
A circle does not have any pairs of parallel sides. In geometry, parallel sides are defined as sides that are always the same distance apart and will never intersect. Since a circle is a curved shape with no straight sides, it does not have any pairs of parallel sides.
Here are three shapes that have two pairs of parallel lines: square parallelogram rectangle There are many polygons with at least two pairs of parallel lines. hexagon (has 3 pairs of parallel lines) octagon (has 4 pairs) decagon (has 5 pairs)