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.
a circle.
a pentagon has 5 lines of symmetry
A 2d shape with uncountable lines of symmetry is a circle.
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A parallelogram
A circle, since it has an infinite number of lines of symmetry
An irregular quadrilateral.
The 2D shape which has one line of symmetry is the trapezium.
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.
Octagon
no shape does! * * * * * Not true. A parallelogram has rotational symmetry of order 2, but no lines of symmetry.
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Impossible.
a circle.