Symmetry Examples for Inspiration

Interesting 2D shapes

Technically a few of these aren't actually two-dimensional shapes, but I image they would be really interesting as flat shapes in Illustrator.

Symmetry in Nature

Here are a few examples of symmetry found in natural objects that appealed to me. 

I like the density in the center and the way the shapes spread out and flatten as they  move away from the center. 

I feel like this does the opposite of the one above....open in the center and condensed towards the outside.

Simple, clean

I thought the triangular form of this was unique