La geometrie a calculat aria triunghiului cu formula de baza.
In geometry she calculated the area of the triangle using the basic formula.
Triunghiul din metal era instrumentul de orchestra pe care il cantea.
The metal triangle was the orchestral instrument he played.
Suma unghiurilor unui triunghi este intotdeauna 180 de grade.
The sum of the angles of a triangle is always 180 degrees.
