Circumference
91Eratosthenes — of Cyrene (Greek polytonic|Ἐρατοσθένης; 276 BC 194 BC) was a Greek mathematician, poet, athlete, geographer and astronomer. He made several discoveries and inventions including a system of latitude and longitude. He was the first person to… …
92Waist — The waist is the part of the abdomen between the rib cage and hips. On proportionate people, the waist is the narrowest part of the torso.Waistline refers to the horizontal line where the waist is narrowest, or to the general appearance of the… …
93History of geography — This article explores the history of geography.Ancient geographyAncient Greeks environment influenced on the ways people met their needs and the way their culture develops.The ancient Greeks saw the poet Homer as the founder of geography. His… …
94Loop antenna — A shortwave loop antenna A loop antenna is a radio antenna consisting of a loop (or loops) of wire, tubing, or other electrical conductor with its ends connected to a balanced transmission line. Within this physical description there are two very …
95Early world maps — Ptolemy s world map (2nd century) in a 15th century reconstruction Early world maps cover depictions of the world from the Iron Age to the Age of Discovery and the emergence of modern geography during the early modern period …
96Arc (geometry) — A circular sector is shaded in green. Its curved boundary of length L is a circular arc. In geometry, an arc is a closed segment of a differentiable curve in the two dimensional plane; for example, a circular arc is a segment of the circumference …
97Body fat percentage — A person s body mass percentage is the total weight of the person s fat divided by the person s weight and consists of essential body fat and storage body fat. Essential body fat is necessary to maintain life and reproductive functions. The… …
98Aryabhatiya — Āryabhatīya , an astronomical treatise, is the magnum opus and only extant work of the 5th century Indian mathematician, Aryabhata. Structure and styleThe text is written in Sanskrit and structured into four section, overall covering 121 verses… …
99Gan (Huvadhu Atoll) — Gan is one of the uninhabited islands of Southern Huvadhu Atoll, in the Gaafu Dhaalu Atoll administrative division.Gan Island was formerly inhabited, but its inhabitants moved to neighboring islands after a severe epidemic at the end of the 18th… …
100Anthropic units — The ability to characterize, quantify, and measure objects in the physical world is an essential milestone towards the development of complex human civilizations. A vast number of measurement standards have evolved over time, and these standards… …
