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Journal Article

Euclidean, Spherical, and Hyperbolic Shadows

Ryan Hoban
The College Mathematics Journal
Vol. 44, No. 2 (March 2013), pp. 126-134
DOI: 10.4169/college.math.j.44.2.126
Stable URL: http://www.jstor.org/stable/10.4169/college.math.j.44.2.126
Page Count: 9
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Euclidean, Spherical, and Hyperbolic Shadows
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Abstract

Summary Many classical problems in elementary calculus use Euclidean geometry. This article takes such a problem and solves it in hyperbolic and in spherical geometry instead. The solution requires only the ability to compute distances and intersections of points in these geometries. The dramatically different results we obtain illustrate the effect curvature has on basic geometric objects.

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