Special right triangle allows one to quickly calculate various lengths in geometric problems without resorting to more advanced methods. "Angle-based" special right triangles are specified by the relationships of the angles of which the triangle is composed. The angles of these triangles are such that the larger (right) angle, which is 90 degrees or radians, is equal to the sum of the other two angles. The side lengths are generally deduced from the basis of the unit circle or other geometric methods. This approach may be used to rapidly reproduce the values of trigonometric functions for the angles 30°, 45°, and 60°. Special
Poem of the Right Angle Poem of the Right Angle The Poem of the Right Angle ("Le Poeme de l'Angle Droit") is a series of 19 paintings and corresponding writings composed by the influential Swiss-French architect Le Corbusier between 1947 and 1953. Aside from his seminal manifesto "Toward an Architecture", "The Poem of the Right Angle" is considered to be his most lucid synthesis of personal maxims. "The Poem of the Right Angle" was composed over a period of seven years, from 1947-1953. The paintings are arranged symmetrically in seven rows, or "zones" and read across, in order, 5, 3, 5, 1, 3, 1, 1