What is the kind of angle and the angle of

Angle commonly known as angle iron, is perpendicular to each other on both sides of a triangle strip steel. There equilateral angle and unequal angle of the points. Equilateral angle of the two sides are equal in width. Its specifications expressed in edge width × width × millimeters thick edge. If "∠ 30 × 30 × 3", it means that the edge width of 30 mm, a thickness of 3 mm edge equilateral angle. Models can also be said that the model is edge width of a few centimeters, as ∠ 3 #. Models do not represent different sides of the same thickness dimension models, contracts and other documents will thus angle of edge width, edge thickness dimension fill is complete, avoid using separate models representation. Hot-rolled edge angle specifications for the 2 # -20 #.