The lowercase letter "h" does not have a diagonal line of symmetry. It is symmetrical along a vertical line, but not along a diagonal. The shape of "h" is such that if you were to draw a diagonal line through it, the two halves would not mirror each other.
Axis of symmetry.
yes
No.
Pentagon
The line of reflection in symmetry is the imaginary line that travels down the line of symmetry. For example, in a square, the line of reflection would be the line down the center of the square, and the line down the diagonal of the square.
It has a line of rotational symmetry - along the diagonal.
Axis of symmetry.
yes
No.
yes
Yes * * * * * Not generally.
no.
If you draw a diagonal line from corner to corner of a parallelogram, that is a line of symmetry.
The diagonal of a square for instance is a simple line of symmetry
square
A square
Pentagon