# Search Results for “nicomedes”

##### Nicomedes Construction for Cube Root

Nicomedes Conchoid is a curve generated by a device involving two sliding joints. It can be used in this construction for two mean proportionals (which is Greek for finding a cube root). See if you can use it to extract cube roots of rational numbers.##### Nicomedes Conchoid Clock

This device is illustrated in Eustocius Commentaries on Archimedes (well.. not the clock part of it, I admit.)##### Nicomedes Conchoid

Nicomedes Conchoid is described in Eutocius' commentaries of Archimedes' book on Spheres and Cylinders. Archimedes glibly describes finding*two mean proportionals*(equivalent to extracting a cube root). Eutocius describes a dozen more or less slippery ways of doing this. One involves a drawing apparatus invented by Nicomedes, on which this clock is based. Drag the red point to vary the curve.