Properties of triangleVersion en ligne In this activity we will work: Definition of a triangle . Classification of triangles by type: Classification of triangles by internal angles and classification of triangles by length of sides. Bibliographic reference: Asif, M. (2019). Properties of triangles - Important formulas and classification. Recovered from: https://e-gmat.com/blogs/properties-of-triangles/ par lina diaz 1 Basic Properties of Triangle 2 Classification of triangles according to internal angles 3 Triangle 4 Classification of triangles by length of sides The sum of all internal angles of a triangle is always equal to 180° The sum of the length of any two sides of a triangle is greater than the length of the third side The side opposite to the largest angle of a triangle is the largest side Any exterior angle of the triangle is equal to the sum of its interior opposite angles Acute Angled Triangle Right-Angled Triangle Obtuse Angled Triangle polygon has three sides has three angles has three vertices Scalene Triangle Isosceles Triangle Equilateral Triangle