Triangle their internal angles, measured here in degrees. A triangle that has two angles with the same measure also has two sides with the same length, and therefore it is an isosceles triangle. It follows that in a triangle where all angles have the same measure, all three sides have the same length, and such a triangle is therefore equilateral. Triangles are assumed to be two-dimensional plane figures, unless the context provides otherwise (see Non-planar triangles, below). In rigorous treatments, a triangle is therefore called a "2-simplex" (see also Polytope). Elementary facts about triangles were presented by Euclid in books 1–4
Three Represents Three Represents The Three Represents or the important thought of Three Represents is a guiding socio-political theory credited to Jiang Zemin, which was ratified by the Communist Party of China at the Sixteenth Party Congress in 2002. Jiang Zemin first introduced his theory on February 25, 2000 while on an inspection tour in Maoming, Guangdong province. He was attempting a comprehensive summary of the party's historical experience and how to adapt to new situations and tasks when he stated: The official statement of the ideology stipulates that the Communist Party of China should be representative to advanced social productive forces,