Pentagon Pentagon In geometry, a pentagon (from the Greek πέντε "pente" and γωνία "gonia", meaning "five" and "angle") is any five-sided polygon or 5-gon. The sum of the internal angles in a simple pentagon is 540°. A pentagon may be simple or self-intersecting. A self-intersecting "regular pentagon" (or "star pentagon") is called a pentagram. A "regular pentagon" has Schläfli symbol {5} and interior angles are 108°. A "regular pentagon" has five lines of reflectional symmetry, and rotational symmetry of order 5 (through 72°, 144°, 216° and 288°). The diagonals of a convex regular pentagon are in the golden ratio to its
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