From the origin is concerned, it is to meet the European space Euclidean "Geometry" five axioms of space geometry. Wikipedia Euclidean geometry explanation given as follows:
1. From another point that can lead to a straight line.
2 can be any infinitely extending line into a straight line.
3. Given any segment may end thereof as a center, a radius of the line segment as a circle.
4. All right angles are equal.
5. If two straight lines intersect with the third line, and at the inner corner of the same side and at right angles is less than two, the two lines must intersect this side.