rhombus
A 25-sided shape would have no parallel sides !
A trapezoid or trapezium. UK definition verses American. One has 2 sides parallel, one has no sides parallel. Take your pick.
A trapezoid has two parallel sides.
A pentagon. If the sides and angles are equal it is a REGULAR pentagon.
A hexagon.
A three sided figure with all unequal sides is called a scalene triangle. ■
A polygon is an unequal six sided shape. A polygon or hexagon is the name used weather the sides are even or not.
A 25-sided shape would have no parallel sides !
A trapezium is a 4 sided quadrilateral with one pair of parallel sides of unequal length, and it is also known as a trapezoid in the USA.
A kite
A rhombus is a four sided shape where all sides are equal length and opposite sides are parallel.
A trapezoid or trapezium. UK definition verses American. One has 2 sides parallel, one has no sides parallel. Take your pick.
A four sided figure with all sides the same length and opposite sides parallel.
An irregular do-decagon
A hexagon.
There is no specific name for such a shape.
it is because a parallelagram is four sided shape with two sets of parallel sides ( sides the same length )