its a shape
A square is a regular polygon with two sets of parallel sides. A parallelogram is an irregular polygon with one set of parallel sides. A rhombus is an irregular polygon with two sets of parallel sides. A rectangle is an irregular polygon with two sets of parallel sides. *Note - a regular polygon is a shape in which all sides are equal in length and all angles are equal in measurement.
Any polygon with four or more sides can have parallel sides.
A triangle having all angles less than 90 degrees is a polygon having no parallel sides and all acute angles.
A shape with parallel sides but no right angles is called a parallelogram
A polygon with 4 or more sides can meet these requirements.
A right trapezoid is a four-sided polygon with two right angles and two parallel sides.
A parallelogram has 2 pairs of parallel sides.
They are angles between adjacent sides of the polygon, measured on the inside of the shape.
There is nothing because if the shape has only four sides and that means two sets that are parallel, the angles will have to be right ones. Unless it's not a polygon that is. I take it back maybe a parallelogram.
A polygon with 5 angles and 5 sides.