How many lines of symmetry does this figure have?
A figure has a line of symmetry if it can be folded over a line so that one half of the figure matches the other half. This fold line is called the line of symmetry.
Here we can see that if we would fold this star over the blue line, it would completely match. We will call this line number one. Here would be another line of symmetry, where if we’d folded the star over the second blue line — the line number two — it would completely match on both sides.
Now we have a third line so that one half of the figure matches the other half if we would fold it over that line number three. Here we have a fourth line. And then we have a fifth line of symmetry. Therefore, this figure has five lines of symmetry.