Because it provided opportunities for establishing proofs of its principles, descartes preferred to work in "geometry".
Geometry is the scientific investigation of shapes and space. Geometry can manage level, two-dimensional shapes, for example, squares and circles, or three-dimensional shapes with profundity, for example, blocks and circles.
Before plunging into two-dimensional and three-dimensional shapes, consider the essential geometric articles that make these shapes: focuses, lines, line portions, beams, and planes.