geometrical method
81number game — Introduction any of various puzzles and games that involve aspects of mathematics. Mathematical recreations comprise puzzles and games that vary from naive amusements to sophisticated problems, some of which have never been solved.… …
82Tangent lines to circles — In Euclidean plane geometry, tangent lines to circles form the subject of several theorems, and play an important role in many geometrical constructions and proofs. Since the tangent line to a circle at a point P is perpendicular to the radius to …
83History of astronomy — History of science …
84Celestial mechanics — is the branch of astrophysics that deals with the motions of celestial objects. The field applies principles of physics, historically classical mechanics, to astronomical objects such as stars and planets to produce ephemeris data. Orbital… …
85History of wood carving — From the remotest ages the decoration of wood has been a foremost art. The tendency of human nature has always been to ornament every article in use. The North American Indian carves his wooden fish hook or his pipe stem just as the Polynesian… …
86Scientific revolution — This article is about a period in the history of science. For the process of scientific progress via revolution, proposed by Thomas Kuhn, see Paradigm shift …
87Indian mathematics — mdash;which here is the mathematics that emerged in South Asia from ancient times until the end of the 18th century mdash;had its beginnings in the Bronze Age Indus Valley civilization (2600 1900 BCE) and the Iron Age Vedic culture (1500 500 BCE) …
88Galileo Galilei — For other uses of Galileo , see Galileo (disambiguation). For other uses of Galileo Galilei , see Galileo Galilei (disambiguation) …
89Johannes Kepler — Infobox Scientist name = Johannes Kepler |175px image width = 175px caption = A 1610 portrait of Johannes Kepler by an unknown artist birth date = Birth date|1571|12|27 birth place = Weil der Stadt near Stuttgart, Germany residence = Baden… …
90Kerala school of astronomy and mathematics — The Kerala school of astronomy and mathematics was a school of mathematics and astronomy founded by Madhava of Sangamagrama in Kerala, South India, which included among its members: Parameshvara, Neelakanta Somayaji, Jyeshtadeva, Achyuta… …
