Mod note: Moved from Precalc Homework, as this seems to be a more general question. Hi, Which mathematical objects (numbers, functions, figures, etc) are more common in nature? I mean the mathematical objects which could more easily be identified with nature. For example, circles and triangles are most common mathematical figures (or, objects) which could be found in nature. Likewise, sine and cosine functions are really common in nature because many natural phenomena are periodic. Golden ratio is another number which is quite common in nature (but not as common as presented in so many fabricated examples) for its own reasons just like Euler's number, e. Thank you for your help.