Elementary Geometry, Then and Now

摘要: What is elementary geometry, and when did it originate? The first of these questions—the content geometry—is not at all simple, a clear-cut answer possible. most natural for present purposes would be the following: “Elementary geometry collection those geometric concepts theorems taken up in secondary school, together with immediate consequences theorems.” However, spite seeming simplicity this answer, raises once host objections. appeal to word “geometric” definition itself hard interpret, since question “what geometry?” also admits no (on that, more below); but any case, rapid rate change school curricula countries world, currently reach its maximum, oblige us if we adopted that accept existence indefinitely many geometries. concept have merely from country country, each given year even school. In addition, such clearly refers only subject “elementary geometry,” while are here asking about corresponding science—or, “science” may seem pompous, direction scientific thought.