They are two shapes that are in line with each other
I I
These two letters are parallel whereas
I _
are not
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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
Infinitely many. Every regular polygon with 2n sides has n pairs of parallel sides. Then there are irregular polygons which can have parallel sides. And there are also irregular shapes which have parallel sides.
An infinite number of shapes.
Circles
Trapezoid