Special right triangle are in the ratio 1 : 2 : 3 and respectively measure 30° (), 60° (), and 90° (). The sides are in the ratio 1 : : 2. The proof of this fact is clear using trigonometry. The geometric proof is: The 30°–60°–90° triangle is the only right triangle whose angles are in an arithmetic progression. The proof of this fact is simple and follows on from the fact that if "α", , are the angles in the progression then the sum of the angles = 180°. After dividing by 3, the angle must be 60°. The right angle
Many-angled ones not be many-angled ones. It is specifically stated – on multiple occasions – that "the many-angled ones live at the bottom of the Mandelbrot set". The beings were referenced in the DC comic book "Hitman", by Garth Ennis, which briefly featured demons called "The Multi-Angled Ones" who end up killing most of Section 8. They also appear in Simon R. Green's Secret History series of books "The Man with the Golden Torc" (2007), "Daemons Are Forever" (2008), and "The Spy Who Haunted Me" (2009). In the Marvel Comics cosmic crossover event "Realm of Kings," written by Dan Abnett and Andy