Why Do We Use Coordinate Geometry?. Euclid’s Elements (about 300 B.C.). http://www.claymath.org/euclid/. Euclidean Geometry. Euclid was a Greek philosopher (c. 330 BC to 275 BC) Euclidean geometry analyses shapes like points, lines, and circles
Why Do We Use Coordinate Geometry?
Descartes used algebra to describe points, lines, and circles geometrically using a coordinate system
y = x2
..at 91, this gentle scholar can recall every racist rule he ever tackled: the "No-Negroes" housing complex where he pushed to have blacks made welcome; the all-white math conferences to which he insisted on bringing black professors; the all-black grade school where he tried to enroll his daughter….These fights lost him a string of jobs and in time got him blacklisted altogether for the "un-American" activity of championing racial equality, driving him to leave his homeland for Canada where he was in fierce demand as a math whiz.
The Toronto Star, Jan 15, 2007