Hyperbolic triangle relations between the sides "s" and the angles "A" of an equilateral triangle (a triangle where all sides have the same length and all angles are equal). The relations are: Whether "C" is a right angle or not, the following relationships hold: The hyperbolic law of cosines is as follows: Its dual theorem is There is also a "law of sines": and a four-parts formula: For hyperbolic trigonometry: Hyperbolic triangle In hyperbolic geometry, a hyperbolic triangle is a triangle in the hyperbolic plane. It consists of three line segments called "sides" or "edges" and three points called "angles" or "vertices".
The Three Degrees The Three Degrees The Three Degrees is an American female vocal group, which was originally formed in 1963 in Philadelphia, Pennsylvania. Although a total of 15 women have been a member over the years, the group has always been a trio. The current line-up consists of Valerie Holiday, Helen Scott and Freddie Pool. Holiday has been a member since she first joined in 1967, while Scott has been a permanent member since 1976, having previously been in the group from 1963 to 1966. The group were particularly successful in the UK, achieving 13 Top 50 hit singles between 1974 and