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
The Three Degrees (album) "Dirty Ol' Man", a #1 hit single in the Netherlands, "Year Of Decision" and the UK #1, "When Will I See You Again". The album charted at #11 on the UK album chart. The album was re-issued on CD in 2010, for the first time in the UK, by Big Break Records. This re-issue includes three bonus tracks including a 1977 remix of "Dirty Ol' Man" by Tom Moulton. with: The Three Degrees (album) The Three Degrees is a 1973 studio album released by girl group The Three Degrees. Since their formation in 1963 until 1969, The Three Degrees had