A 3 By 1 Triangle is a 4-dancer formation in the following shape:
A 3 By 1 Triangle contains one Apex dancer and three Base dancers.
  The facing directions of the dancers usually form a Generalized
  Tandem-Based Triangle.  3 By 1 Triangles
  are most commonly used from an "H" or a Generalized 1/4 Tag setup.
| Examples of 3 By 1 Triangles: 
 | 
3 By 1 Triangle Circulate [C2]:
From a 3 By 1 Tandem-Based Triangle.
  Move forward to the next position within the 3 By 1 Triangle, turning 180°
  if moving from the Apex to a Base position or vice-versa.  Base
  dancers not moving to the Apex position do not change their facing direction. 
| R-H 3 By 1 Triangle Circulate: 
 |   |  |   |  | before 3 By 1 Triangle Circulate
 |  | after 
 | 
 In the above example, the Apex dancer(  )
and the #3 Base dancer 
(  ) 
must resist the temptation to  
  Jaywalk  
  with each other. | 
| Facing 3 By 1 Triangle Circulate: 
 |   |  |   |  | before 3 By 1 Triangle Circulate
 |  | after 
 | 
 | 
 See also Interlocked 3 By 1 Triangles [C2]
 and Reshape (The Triangle) [C2].