You can find more about symmetry from Khan Academy, or just by simply searching "symmetry" in a basic Mathematics textbook. Usually, good results can be found on Wikipedia.
The answer will depend on the figure, the type(s) of symmetry and what information about is is given.
you can find a line of symmetry when the shape can be folded and not cross over
You can find many lines of symmetry in nature.
i section
radial symmetry, i am trying to find the reason now!
Yes rectangles and parallelograms have rotation symmetry. rectangles and parallelograms have a rotational symmetry of 2. I hope this information helps you.
z is not a line of symmetry. Furthermore, z does not have a line of symmetry.
A square has 4 lines of symmetry.
You can find lines of symmetry without tracing but tracing helps you get a better picture of it.
in a book
It would be hard to find a line of symmetry on a moon, as it is likely to be irregularly shaped.
X= -b / 2a