The Area of a Disk If you are aware of elementary facts of geometry, then you might know that the area of a disk with radius $ R$ is $ \pi R^2$ . The radius… Read More Calculus Geometry Math Real Analysis Recreations Study Notes January 27, 2012

A Problem On Several Triangles A triangle $ T $ is divided into smaller triangles such that any two of the smaller triangles either have no point in common, or have a vertex in common,… Read More Math Problems Puzzles Study Notes August 13, 2011