1. The branch of mathematics dealing with two-dimensional figures and shapes that lie on a flat plane, without depth or three-dimensional properties
In flat geometry, we study the properties of triangles, circles, and polygons.
Na geometria plana, estudamos as propriedades de triângulos, círculos e polígonos.
2. Euclidean geometry as it applies to plane surfaces
The theorems of flat geometry form the foundation for more advanced mathematical studies.
Os teoremas da geometria plana formam a base para estudos matemáticos mais avançados.
Flat geometry (geometria plana) is a core component of mathematics curricula in both Brazil and Portugal, typically introduced in middle school and continued through high school. It serves as the foundation before students advance to solid geometry and calculus.