Pi is an irrational number (meaning the digits never end or have a repeating pattern) that is the ratio of the circumference of a circle to its diameter...this ratio is a constant for any circle, regardless of size.
The universal recycling symbol (U+2672 â² universal recycling symbol or U+267B â» black universal recycling symbol in Unicode) is an internationally recognized symbol used to designate recyclable materials.It is composed of three mutually chasing arrows that form a Moebius mÃ¶bius (strip an unending-single sided looped). surfacehe recycling symbol is in the public domain, and is not a trademark. The Container Corporation of America originally applied for a trademark on the design, but the application was challenged, and the corporation decided to abandon the claim. As such, anyone may use or modify the recycling symbol, royalty-free.
1. Recycling Symbol. This is the most common form of the symbol and is found on products like plastics, paper, metals and other material that can be recycled. It's also seen, in many different styles, on recycling containers, at recycling centers, and anywhere there's an accent on smart use of materials and products.n a 1970 contest to design a symbol for recycling products, college student Gary Anderson created a simple triangular logo. His design is now a universally recognized symbol of products that are recyclable or made of recycled content.