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
Kings of the Angles have occurred on an island named Scani or Scandza (Scania), and according to William of Malmesbury ("Gesta regum Anglorum") he was later chosen as King of the Angles, reigning from Schleswig. His descendants became known as Scefings, or more usually Scyldings (after Sceldwea). The "Anglo-Saxon Chronicle" derives the royal lines of the Heptarchy from a common ancestor, Woden, a euhemerized version of the Germanic deity, and said to be a descendant of the aforementioned Sceaf. The senior line of this genealogy was that of Mercia, descended from the rulers of the Angles. The historical Anglo-Saxon invasion of Britain took place