Symmetry in Nature!

Solution 1 Imagine $11$ lines emerging from one point. If $n$ lines emerge from one point, where $n$ is odd, we shall have $n$ lines of symmetry, each one beginning at one line and passing in the middle of two more lines. That makes $11$ lines of symmetry.

Solution 2 Consider an $11$ -sided polygon. As discussed in the "Recognizing Symmetry" section of Symmetry , an $n$ -sided polygon has $n$ lines of symmetry.