all right some body said that Ellipse Circle Oval but parallel shapes need to have lines so they are not parallel shapes so all i know that are not parallel is a diamond and a rhombus
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It can have 0, 1 or 2 pairs of parallel lines.
A pentagon can have 0, 1 or 2 pairs of parallel lines. It can have 0 to 4 lines perpendicular to an adjacent line. A rhombus must have two pairs of parallel lines and none of them may be perpendicular to any other.
There cannot be parallel lines in any [plane] triangles.
There are absolutely 0 parallel lines in any given triangle.
You can have 0, 1, 2, or 3 pairs of parallel sides in a heptagon.