August 25, 2006
Volume 11 No. 34

In This Issue

Math Open Reference - Plane Geometry

PRISM-NEO Sketches Navigation Matrix

Ancient Writings Revealed!

Archimedes Home Page


Math Open Reference - Plane Geometry

John Page defines his project as "A free interactive math textbook on the web, initially covering high-school geometry." The project has completed the prototype stage and production of the final version has begun, including these sections:

  • Points, Lines and Planes
  • Angles
  • Parallel Lines
  • Triangles
  • Quadrilaterals
  • Polygons
  • Circles, Ellipses and Arcs
  • Constructions
  • Famous Geometers
  • Graphical Quadratic explorer

The site's many interactive "Try this" illustrations require Java and Flash:

PRISM-NEO Sketches Navigation Matrix

The Programming Remediation and Intervention for Students in Mathematics (PRISM-NEO) site offers hands-on Geometer's Sketchpad manipulatives -- plus "some things that cannot be done by hand!"

The GSP files, as well as some QuickTime movies, are organized into Grade 7, Grade 8, and Grade 9 under the following topics:

  • Area
  • Central Tendency
  • Equations
  • Integer Addition
  • Integer Subtraction
  • Graphing
  • Properties of 2D Shapes
  • Properties of 3D Figures
  • Ratios
  • Transformations
  • Perimeter
  • Volume

The Geometer's Sketchpad Instructor's Evaluation Edition

The Instructor's Evaluation Edition of Sketchpad 4 is similar to the full product except that you cannot save or print your work, you cannot copy and paste work to other programs, and you cannot export work as dynamic JavaSketchpad Web pages. It will expire 60 days after first use.

Exploratorium - Ancient Writings Revealed!

Ancient ideas met modern science at the Exploratorium, San Francisco, CA, on August 4, 2006. Using state-of-the-art scientific tools, once-hidden writings by the ancient Greek mathematician Archimedes were uncovered, revealing evidence of science not seen for centuries.

On hand for the webcast were Uwe Bergman of Stanford University and Abigail Quandt, head of book and paper conservation at the Walters Art Museum, both at Stanford's Synchrotron Radiation Laboratory. In studio at the Exploratorium was William Noel, curator of manuscripts and rare books at the Walters Museum and the project director for the Archimedes palimpsest. At the Exploratorium, a Greek scholar was on hand to help read and interpret the ancient hidden thoughts of Archimedes as they were revealed during this unique event.

The website includes links to:

  • Watch the Archived Webcast
  • About the Document
  • Reading Ancient Texts
  • About Our Guests
  • Peering into the Mind of Archimedes

Archimedes Home Page

This site by Chris Rorres is a collection of Archimedean miscellanea, supplemented by text and graphics.


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