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spherical triangle

noun Geometry.
  1. a triangle formed by arcs of great circles of a sphere.
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Origin of spherical triangle

First recorded in 1575–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for spherical triangle

spherical triangle

noun
  1. a closed geometric figure formed on the surface of a sphere that is bounded by arcs of three great circles
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012