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Green Jello World and Escher’s World

Ruth I. Berger
The College Mathematics Journal
Vol. 45, No. 1 (January 2014), pp. 50-53
DOI: 10.4169/college.math.j.45.1.050
Stable URL: http://www.jstor.org/stable/10.4169/college.math.j.45.1.050
Page Count: 4
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Green Jello World and Escher’s World
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Abstract

Summary Introducing models of hyperbolic geometry informally in the setting of different worlds lets students naturally come up with the idea that lines (shortest paths) can look like parts of Euclidean circles. By learning to think like inhabitants of these worlds, students are able to abandon their totally Euclidean view of lines and take ownership of hyperbolic geometry

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