**Last Updated: 14 Mar 2011**

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**Lattice Cubes** (14 Mar 11) have eight corners, each one a lattice point in 3-space. Not every lattice segment can be an edge of such a cube, however. (520K)

**Commensurable Triangles** (7 Mar 08) classifies integer-sided triangles in which one angle is a rational multiple of another. (764K)

**A Waiting-Time Surprise** (2 Feb 08) explores the accumulation of random numbers. (420K)

**
The Root-Finding Route to Chaos** (4 Jun 03) describes how fractals can be inserted into
the precalculus curriculum. (258K)

**Calculator Algorithms** (19 Aug 01) describes how calculators
evaluate elementary functions. (180K)

**The Geometry of Linear Regression** (7 Dec 98) explains how
the least-squares line got its name. (104K)

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