This is an essay on the role of philosophy in Islam according to Al-Farabi, Avicenna, and Averroes, who are Islamic philosophers and writers from the Middle Ages.

This long encyclopedia entry describes what is known about the life and philosophy of Plato (born ca. 427 BCE), the author of the Republic. ?The Catholic Encyclopedia? is a historic reference source and should be viewed in the context of...

Good introduction from the Internet Encyclopedia of Philosophy to the history of the Neoplatonic vein of ancient Greek philosophy. Includes information on Porphyry, Jamblichus, and the Athenian school. Not a substantial treatment of...

Excellent site designed to lead students through the major Platonic dialogues which relate the death of Socrates. Texts are annotated with comments and hyperlinked explanations. Audio files of important passages included, as well as a...

This site from ScienceWorld provides a short, informative description of many of the contributions of Pythagoras to mathematics. Links exist to some of the contributions as well as to additional information.

This tutorial features templates and instructions to make the following solids: tetrahedron, cube, octahedron, dodecahedron, and icosahedron.

This question and answer site from The Math Forum with Dr. Math discusses the angle between two adjacent faces of an octahedron. Links are also provided for additional information on related subjects.

This site from Dr. Math and the Math Forum provides several links to pictures of icosahedrons. The information is somewhat brief, but worth checking out for a background on the subject.

Encyclopedia article about Plato that includes information about his life and works. Also includes a long list of references and links to additional information.