What makes something Euclidean?
There are five in Euclidean geometry: that any two points can be connected by a straight line, that any line segment can be stretched out forever in either direction, that we can always define a circle given a center and a radius, that all right angles are congruent, and that for any line and any point not on that line ...
There are five in Euclidean geometry: that any two points can be connected by a straight line, that any line segment can be stretched out forever in either direction, that we can always define a circle given a center and a radius, that all right angles are congruent, and that for any line and any point not on that line ...
