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Rethinking Pythagoras
This article explores analogues of the Pythagorean Theorem in non-Euclidean geometries.

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Geometry Playground

by Daniel Heath (Pacific Lutheran University) and Joshua Jacobs (University of Washington)

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Activity: The Perfect Triangle

This activity explores the construction and properties of an equilateral triangle in Euclidean, Spherical and Hyperbolic geometries. The authors would like to thank Elly Claus-McGahan, who contributed this activity.

Click here to open the Geometry Playground applet in a new window.

Click here to open a pdf file which contains the instructions for the activity.

Next page >> Activity: Projective Geometry

Pages: | 1 | 2 | 3 | 4 | 5 | 6 | 7 |

Heath, Daniel and Joshua Jacobs, "Geometry Playground," Loci (September 2010), DOI: 10.4169/loci003567

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