I am not a student but should become one again as I apparently did not learn enough in school. I am faced with a real world question I do not know how to answer using mathematics. Here is the problem without too much physical detail: I need to construct a circle (rough circle) out of 31 panels that are 12 feet long. They are connectable with zero clearance. In addition is a gate that is 6 feet wide. How would I compute the diameter or the circumfrance of this circle? Is this enough data to compute an answer? Another way to ask this is what is the circumfrance or the diameter of a circle made from a line that is 378 feet long?