Special right triangle triangles are used to aid in calculating common trigonometric functions, as below: The 45°–45°–90° triangle, the 30°–60°–90° triangle, and the equilateral/equiangular (60°–60°–60°) triangle are the three Möbius triangles in the plane, meaning that they tessellate the plane via reflections in their sides; see Triangle group. In plane geometry, constructing the diagonal of a square results in a triangle whose three angles are in the ratio 1 : 1 : 2, adding up to 180° or radians. Hence, the angles respectively measure 45° (), 45° (), and 90° (). The sides in this triangle are in the ratio 1 : 1
International (The Three Degrees album) International (The Three Degrees album) International is a 1975 studio album released by the female girl group The Three Degrees. The album includes the 1974 hit single, "TSOP (The Sound of Philadelphia)". In the United Kingdom, the album was released under the title "Take Good Care of Yourself", where it charted at #6, in Europe the album was issued with the alternative title of "With Love". The album was also issued in Japan with an alternative running order and several different tracks. The album was re-issued in October 2010, for the first time in its entirety on CD by Big