Because it doesn't but it does have 4 sides which makes it a quadrilateral polygon and it's diagonals intersect at 90 degrees.
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A kite
No.
A kite has no parallel sides but it is a 4 sided quadrilateral whose 4 interior angles add up to 360 degrees
None
not neccessarily. it can have parallel lines, but it doesn't have to. a kite for example, has no parallel lines, but it is a quad. but it can, such as rhombuses, squares, rectangles, parallelograms, and trapezoids