A biography of Euclid A comprehensive biography of the mathematician and author of The Elements, including links to other relevant websites.

An introduction to Euclid An introduction to the works of Euclid, with an emphasis on The Elements.

Interactive Euclid's Elements Uses Java to give an interactive demonstration of Euclid's Elements.

Byrne's edition of Euclid An edition of Euclid's Elements published in England in 1847, by the mathematician Oliver Byrne.

The Visual Elements of Euclid Another edition of Euclid's Elements, based on the translation from Greek by Heath in the 1920s, but with each proposition broken down into a series of graphic representations.

Trisecting an angle A comprehensive look at one of the three classical problems in Greek geometry.

Duplicating a cube The problem of duplicating a cube, along with solutions and exercises, is explored by the University of Kentucky's distance learning web pages.

Survival and influence of Greek mathematics A broad history of the development of mathematics and developments in geometry, from the Britannica.com website.

The Measurers Biographical material on mathematicians and developments in geometry from the Museum of the History of Science website.

The complexity of geometric constructions Constructions created using straight-edge and the collapsing compass - the tools of Euclid.

Grace - Graphical Ruler And Compass Editor An interactive ruler and compass construction editor which, like the interactive geometry in this unit, requires Java to be enabled in your browser.

Compass-only constructions Illustrates compass-only constructions from Martin Gardner and A. N. Kostovski's books on the subject (see the section below on Books).

Geometric construction with the compass alone Looks at constructions which can be created by using the compass alone, with reference to the work of Lorenzo Mascheroni and Jacob Steiner.

Sacred geometry Looks at the relationship between geometry and the patterns and designs found in the natural world.

Native American Geometry A study of the physical and proportional geometry which originates from the simple circle, amongst native Americans.

Crop circles and sacred geometry An intruiging look at the correlation between sacred geometry and the phenomenon of crop circles, which includes a brief outline of the origins of sacred geometry.

Another source book is Sacred Geometry by Robert Lawlor, which explores geometry using illustrations from science and art, such as Islamic tiles, atomic structure, architectural proportions and fine art. Nine workbooks lead you through geometric constructions using only a pencil, compass, straight-edge and graph paper. Includes the Vesica Piscis, Golden Section, Squaring the Circle, Geometry and Music, the Platonic Solids and more. Interspersed with philosophy about the meanings and symbolism of sacred geometry.

Some of the ideas in Sacred Geometry are included as a part of this unit and you can browse through them at any time.

Other useful books: