A 25-sided shape would have no parallel sides !
A trapezoid is a shape that has 4 sides and 2 parallel sides. The sides that are parallel are called the bases.
A rectangle is a shape that has four sides with two parallel lines.
A trapezoid has two parallel sides.
The four sided shape that has two parallel lines is called a trapezoid. A parallelogram is a four sided shape that has two pairs of parallel lines.
If two sides are parallel and the other two aren't, the shape is a trapezoid.
Well If you are looking for a four sided shape with no parallel sides it is called a trapezium.
A four-sided shape in which only two sides are parallel is called a trapezoid. All two-dimensional, four-sided shapes are known as quadrilaterals.
trapezium
a parallelogram is a quadrilateral with four parallel sides. a trapezoid is a quadrilateral with two parallel sides.
Parrallelagram
trapezium