I got a problem that I need to figure out. I have a piece of pipe 20 inches long and I bend it on a radius at 90 degrees. I measure from the back of the pipe to the end of one side and get 9, I flip it the other way and do the same thing and get 13.555. If you add those you end up with a right angle vs radius' gain of 2.555 inches. Now the 90* bend is only on part of the pipe as the rest is straight. Is there any way to figure the radius based on just what I said? This isn't homework it's just something I have been working on for a few weeks that is puzzling me like crazy. Thanks.