So my mother and I are trying to redo a basement and we thought it would be fun to close off part of the basement with shower curtains. Well here is my dilemma: The width of the area we want to close off is 13ft. we found crescent shaped shower curtains on the website listed below but they are for a 5ft. bath so if we bought 3 crescent shaped rods that would be 15ft am I right or does it change the length since there is a crescent shape in the rods? Help please! How many rods do i need and will 3 rods fit? I need to understand the math!?...Confused... Here is the website for details/measurements: www.lnt.com/product/index.jsp?productId=1433779&cp=1331604.1331614.1331933&parentPage=family Create extra space in your shower with the Cresent Rod™ curved shower rod. The rod curves 3 inches inward at the corners to help prevent leaks and 6 inches outward in the middle for extra space. The rod is perfect for use with oval tubs and uses a standard shower curtain. Features Offers extra space and comfort Curves 3 in inward at the corners to stop leaks Curves 6 in outward in the middle, beyond the tub's rim, for extra space For 5-ft standard and oval tubs Uses regular shower curtain I want to connect all 3 rods to make an even bigger crescent so will that change the diameter?