Web Geometry: some simple uses of the Geometer's Sketchpad Java Applet

• An ancient triangle
• A (regular) triangle of centroid 0
• A regular triangle and anti-triangle
• A regular pentagon and anti-pentagon
• A regular pentagram and anti-pentagram
• A regular pentagon and pentagram
• A regular pentagon and an anti-pentagram
• Square and Anti-Square Averaged
• Square and Anti-Square and Dipole Averaged

Related links (some even linkages)

• Chebyshev's Straight-line Mechanism at http://www.mechanisms101.com
• Watt's Linkage at http://www.mechanisms101.com