A regular polygon with an even number of sides.
a rhombusNotice that if all 4 sides are equal, then they must be parallel.
A trapezoid (or trapezium in some regions) is a 2D shape that has one pair of parallel sides. The parallel sides are known as the bases, while the other two sides are called the legs. In an isosceles trapezoid, the legs are of equal length, adding symmetry to the shape.
Any polygon with four or more sides can have a pair of parallel sides. It is also possible to to have non-polygonal shapes - eg a cigar-shape - that has parallel sides.
It can have anywhere between 0 and 12 pairs of parallel sides.
A 2D trapezium, also known as a trapezoid in some regions, has four sides. It consists of two parallel sides and two non-parallel sides. This shape is a type of quadrilateral, which means it always has four sides.
a rhombusNotice that if all 4 sides are equal, then they must be parallel.
A square, a rectangle or a rhombus !
a trapizoid is the 2d shape for that
Any polygon with four or more sides can have a pair of parallel sides. It is also possible to to have non-polygonal shapes - eg a cigar-shape - that has parallel sides.
It can have anywhere between 0 and 12 pairs of parallel sides.
trapezoid
rhombus
any rhombus
A triangle as no other 2d shape can have 3 sides.
Any polygon with four or more sides can have parallel lines. So also can some irregular shapes.
A 2D shape with 9 sides is called a Nonagon.
The shape of 2D is a flat surface.