| Examples of (symmetric) Interlocked 3 By 1 Triangles: 
  dancers work together and 
  dancers work together in a 3 By 1 Triangle
 | 
As with 
  3 By 1 Triangles, 
  Interlocked 3 By 1 Triangles are usually a
  Generalized Tandem-Based Triangle instead of Wave-Based Triangle.
| |   |  |   |  | before Interlocked 3 By 1 Triangle Circulate
 |  | after 
 | 
 | 
| |   |  |   |  | before (Facing)
 Interlocked 3 By 1 Triangle Circulate
 |  | after 
 | 
 | 
Typically the only calls done from (Interlocked) 3 By 1 Triangles are Circulate,Funny Circulate, 
 and Reshape.
 See also 3 By 1 Triangle FORMATION [C2].