A parallelogram
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 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 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
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.
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.
any rhombus
A triangle as no other 2d shape can have 3 sides.