Equilateral triangle Equilateral triangle In geometry, an equilateral triangle is a triangle in which all three sides are equal. In the familiar Euclidean geometry, an equilateral triangle is also equiangular; that is, all three internal angles are also congruent to each other and are each 60°. It is also a regular polygon, so it is also referred to as a regular triangle. Denoting the common length of the sides of the equilateral triangle as "a", we can determine using the Pythagorean theorem that: Denoting the radius of the circumscribed circle as "R", we can determine using trigonometry that: Many of these quantities
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