Unlike a normal triangle, a spherical triangle can be birectangular because the sum of its angles is greater than 180 degrees.
Source: wiktionary
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Unlike a normal triangle, a spherical triangle can be birectangular because the sum of its angles is greater than 180 degrees.
Source: wiktionary
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.