It can be a trapezium, parallelogram, rhombus, rectangle or square.
Any polygon with four or more sides can have perpendicular and parallel lines.
parallelogram
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.
Any polygon with four or more sides can have parallel lines. So also can some irregular shapes.
Any polygon with more than 3 sides can have two pairs of parallel sides.If it has only four sides and they make two parallel pairs, then it's a parallelogram.
-- A trapezoid always has.-- Any polygon with more than four sides can have, but doesn't always.
A square is a four-sided polygon with two congruent parallel sides.
A four-sided polygon with opposite sides parallel and all sides congruent is a square.
Any polygon with four or more sides can have parallel sides.
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.
The four sides are NOT parallel. If the fours sides were parallel , it would NOT be a polygon., but just four lines. The opposite sides are parallel. Being the same length, it could be either a 'SQUARE' or a 'RHOMBUS'. The difference being that the square has four right angles (90 degrees)-. A Rhombus has the opposite angles the same, but not a 90 degrees.
quadrilateral