Geometry Rules

The ancient Greek mathematician Euclid created five postulates as a foundation for Euclidean Geometry forming the basic rules of the two-dimensional geometric space. These are the principles rules of geometry. They make Euclidean Geometry possible which is the mathematical basis for Newtonian physics. Two-dimensional geometry starts with the Cartesian Plane, created by the intersection of two perpendicular number lines that represent the two variables in a geometric equation. They define the set of real numbers for the evaluation of mathematical functions with two variables. In the following rule definitions a pair of parallel lines are two different lines with the same numerical slope. In a Euclidean two-dimensional geometric space it is defined that two infinite parallel lines never meet. In the real world physics of Einstein this may not be true, but these rules are followed within the realm of Euclidean Geometry.