Discovered Pages
[Discover] Interactivate: Standard Goal - 3-5 grade NCTM math http://www.shodor.org/interactivate/standards/organization/1/71/
(geomerty activities estimate measurement) 
[Discover] Calculate the intersection point of two lines in F# http://www.navision-blog.de/2008/12/02/calculate-the-intersection-of-two-lines-in-fsharp-2d/ (geomerty .net programming calculations)