square
A square
Pentagon
It has a line of rotational symmetry - along the diagonal.
Axis of symmetry.
effectively yes. Diagonal symmetry is when the line of symmetry goes diagonally, rather than horizontally or vertically
yes
No.
yes
Yes * * * * * Not generally.
All regular shapes have a line of symmetry. But you can get rid of its line of symmetry by making it irregular (so the angles aren't the same).
no.
If you draw a diagonal line from corner to corner of a parallelogram, that is a line of symmetry.