The number of symmetry lines for a star depends on the particular types of star. A five-pointed star has five lines of symmetry. However, a six-pointed star has six lines of symmetry.
In math, a symmetry line refers to an imaginary line that one can fold an image or shape such that both halves match exactly. In a five-pointed star, there are five of these lines. One finds these symmetry lines by drawing a line that extends from the top of each of the five points to the opposite side. In each case, the two halves of the star formed are symmetrical.