In this section, we look at Euclidean Geometry, in particular we examine Euclid's 5 postulates. Then we will look at non-Euclidean geometry, in particular fractals and dimension. Two points determine one and only one straight line. A straight line extends indefinitely in either direction. A circle may be drawn with any given center and any given radius.
All right angles are equal.
P not on l, there is one and only one straight line through P that is parallel to l. A geometric structure satisfying these is a Euclidean Geometry. Read about the life and work of Euclid . Read about Rene Descartes , after whom Cartesian Geometry is named. A Java Applet for the Koch Fractal.