Integer triangle cosine equals 0, ±1/2, or ±1. The only ones of these giving an angle strictly between 0° and 180° are the cosine value 1/2 with the angle 60°, the cosine value –1/2 with the angle 120°, and the cosine value 0 with the angle 90°. The only combination of three of these, allowing multiple use of any of them and summing to 180°, is three 60° angles. Conditions are known in terms of elliptic curves for an integer triangle to have an integer ratio "N" of the circumradius to the inradius. The smallest case, that of the equilateral triangle, has
The Three Degrees following year they released a new single "Holding Back". In January 2011, Freddie Pool replaced Cynthia Garrison, who was suffering from Piriformis syndrome, as the Degrees had touring commitments to fulfill. In 2016 The Three degrees released their first full-length studio album with member Freddie Pool entitled "Strategy: Our Tribute To Philadelphia", through Cherry Red Records. The Holiday/Scott/Garrison version of The Three Degrees was the longest running formation of the group (1989–2010). 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