Metrical Geometry Is Thus A

Euclid Avoids It [the Treatment Of The Infinite]; In Modern Mathematics It Is Systematically Introduced, For Only Then Is Generality Obtained.

Not That The Propositions Of Geometry Are Only Approximately True, But That They Remain Absolutely True In Regard To That Euclidean Space Which Has Been So Long Regarded As Being The Physical Space Of Our Experience.

Metrical Geometry Is Thus A Part Of Descriptive Geometry, And Descriptive Geometry Is All Geometry.

As For Everything Else, So For A Mathematical Theory: Beauty Can Be Perceived But Not Explained.

Projective Geometry Is All Geometry.