| 1. | His name was given to a theorem of spherical triangles.
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| 2. | Also, any two similar spherical triangles are congruent.
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| 3. | Girard also showed how the area of a spherical triangle depends on its interior angles.
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| 4. | It can be obtained from consideration of a spherical triangle dual to the given one.
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| 5. | For example, the sum of the interior angles of a spherical triangle exceeds 180 degrees.
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| 6. | This involves resolving a spherical triangle.
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| 7. | The chancel windows are spherical triangles.
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| 8. | He exhaustively cataloged the central and surface angles of these spherical triangles and their related chord factors.
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| 9. | The Reuleaux triangle may also be interpreted as the conformal image of a spherical triangle with 120?angles.
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| 10. | It is based on the idea of tiling a sphere, with spherical triangles see Schwarz triangles.
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