An irregular quadrilateral.
There is no such shape. A 2d shape with 5 sides and all equal angles must be a regular pentagon (or a 5-pointed star if you stretch the definition of "all angles"). And a regular pentagon - or star - has 5 lines of symmetry.
It is an hexagon which has 6 sides
A triangle as no other 2d shape can have 3 sides.
any rhombus
A 2d shape with uncountable lines of symmetry is a circle.
An irregular quadrilateral.
There is no such shape. A 2d shape with 5 sides and all equal angles must be a regular pentagon (or a 5-pointed star if you stretch the definition of "all angles"). And a regular pentagon - or star - has 5 lines of symmetry.
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Impossible.
A circle, since it has an infinite number of lines of symmetry
The 2D shape which has one line of symmetry is the trapezium.
It is an hexagon which has 6 sides
This varies according to the polygon. A polygon is any 2D closed shape with three or more straight sides. Therefore, a polygon such as a square will have four lines of symmetry, but an irregular hexagon may have several or none. Even a triangle can have between zero and three lines of symmetry, depending on the type of triangle it is.
A triangle as no other 2d shape can have 3 sides.
any rhombus
A 2D shape with 9 sides is called a Nonagon.