| 11. | The product of two versors can be compared to a spherical triangle where two sides add to the third.
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| 12. | The resulting tesselation has 4 ?6 = 24 spherical triangles ( it is the spherical disdyakis cube ).
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| 13. | This is also the only uniform polyhedron that cannot be made by the Wythoff construction from a spherical triangle.
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| 14. | The solution of the celestial triangle used the John Napier rules for solution of square-angled spherical triangles.
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| 15. | The plane-triangle congruence theorem angle-angle-side ( AAS ) does not hold for spherical triangles.
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| 16. | Consider a spherical triangle one of whose vertices is the North Pole and the other two lie on the equator.
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| 17. | The general spherical triangle is fully determined by three of its six characteristics ( 3 sides and 3 angles ).
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| 18. | A spherical triangle is thus formed by the junction lines, the curves upon which average somewhere about sixty chains radius.
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| 19. | If the angles of the spherical triangle are chosen appropriately, the triangles will tile the sphere, one or more times.
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| 20. | Note that the sides of a spherical triangle are measured by angular rather than linear units, based on the corresponding central angles.
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