Hello Tommy, one of my peers at another facility asked me why I chose this particular mathematical series to determine the Hyp. I explained to him that I felt it is sometimes better to utilize the K.I.S.S. method, so in this case I have added some steps to come up with the Hyp.(equal to the long side of the ellipse). To shorten this regimen you can simply take the 6" dimension and divide it by the angle 40 cosine and you will get the answer to the Hyp. much more quickly. I have attached a modified sketch with a triangle in red and some additional verbage to illustrate the shorter method. I mentioned K.I.S.S., in the fabrication class that I teach I have tried to limit the math to basic mathematical formulas in hopes that most individuals will be able to remember them more readily and thus use them more. Hope things are going well for you. Thanks for your comments..... I'm still waiting for those shortcuts/tricks that I know you have stored away. Best regards, Allan