To whom it may concern. In you November issue of HandyMan on page 12 you printed an article entitled "The Exact Arc you need" You have to have the basic skill of Algebra to figure the answer to the problem and to find the Arcc radius. I have a project of building Valances for a customer and they all call for arcs over the window. Would it be possible to show step by step as to how I would figure this problem out. I did ask some college students about the problem and they had no idea what I was talking about. All positive help will be appreciated.