Sum of angles of a triangle to zero. For a spherical triangle, the sum of the angles is greater than 180° and can be up to 540°. Specifically, the sum of the angles is where "f" is the fraction of the sphere's area which is enclosed by the triangle. Note that spherical geometry does not satisfy several of Euclid's axioms (including the parallel postulate.) Angles between adjacent sides of a triangle are referred to as "interior" angles in Euclidean and other geometries. "Exterior" angles can be also defined, and the Euclidean triangle postulate can be formulated as the exterior angle theorem. One can also consider the
The Conversion of Sum Loo The Conversion of Sum Loo The Conversion of Sum Loo is a short story by Willa Cather. It was first published in "Library" in August 1900. After his first wife dies without giving him the progeny his recently deceased father strongly wished him to have, Sum Chin, who grew up in China and now lives in San Francisco, decides to get married to the daughter of a friend he had in China. They have a child together, Sum Wing, and baptise him. The child dies, and Sum Chin becomes very mournful; this was his last chance of living up to