Line of Symmetry: Can you draw a line along the guitar which, when folded along this line, makes the two halves line up? Rotational symmetry: How many degrees do you have to rotate the guitar to make it map onto itself?
Lines of symmetry: one Rotational symmetry: none
Practice makes perfect
A way to think about lines of symmetry is that, if you are able to fold a figure along some line so that the two parts line up, then we have found a line of symmetry. For the picture of the guitar, there is only one way of folding it that fits this criteria.
Regarding rotational symmetry, we would have to rotate it 360^(∘) to make it map onto itself. However, rotational symmetry is defined as a rotation of 180^(∘) or less. Therefore, the object does not have any rotational symmetry.
