Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possibility of the use of Cartesian method in the proofs of fundamental
  theorems of school planimetry   We show how Cartesian method can be used in the proof of fundamental
planimetric topics of the school course, such as introduction of trigonometric
functions, equation of a line and similarity of triangles.
  This work also can be considered as a plan of the school course of geometry,
where the Cartesian method plays the main role.

27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat