Have you seen the cool ad for this tool? Amazon is selling the QrBxa Angleizer Template Tool for just $9.99! (Reg $25.99) This will measure all angles and forms a template for you. Just place the angle-izer template tool onto your work area, slide the rulers into the shape needed, and tighten the screws. Which can lock into any desired angle as a reusable stencil for endless applications.