It could have as many as four, but it doesn't necessarily have
any at all. It depends on the individual parallelogram.
None.
A nephroid has 2 lines of symmetry.
it has five lines of symmetry
10 lines of symmetry
4 Lines of symmetry
2 lines OF SYMMETRY
2 lines of symmetry
It has 2 lines of symmetry.
no lines of symmetry
2 lines of symmetry
5 lines
There are infinitely many lines of symmetry. Every line can be a line of symmetry for a suitable shape.