Equilateral pentagon Equilateral pentagon In geometry an equilateral pentagon is a polygon with five sides of equal length. Its five internal angles, in turn, can take a range of sets of values, thus permitting it to form a family of pentagons. The requirement is that all angles must add up to 540 degrees and must be between 0 and 360 degrees but not equal to 180 degrees. In contrast, the regular pentagon is unique, because it is equilateral and moreover it is equiangular (its five angles are equal; the measure is 108 degrees). Four intersecting equal circles arranged in a closed chain
Kings of the Angles such as Wihtlæg, who defeated and killed Amleth, King of the Jutes. Under Wermund the Angles' fortress at Schleswig is said to have been captured by a branch of the Saxons known as the Myrgings, but was retaken by Offa about whom many tales were told (and who is usually referred to as Offa of Angel to distinguish him from his supposed descendent Offa of Mercia). The legends give Offa as bride a daughter of Freawine, governor of Schleswig, and upon becoming king he is said to have secured the Angles' southern border with the Saxons along the River Eider.