Line of Symmetry: Can you draw a line along the basketball which, when folded along this line, makes the two halves line up? Rotational symmetry: How many degrees do you have to rotate the basketball to make it map onto itself?
Lines of symmetry: two Rotational symmetry: 180^(∘)
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 basketball, there are two ways of folding it that fits this criteria.
Regarding rotational symmetry, we have to rotate the basketball 180^(∘) for it map onto itself.
