Triangle FORMATION [C1]:
 A Triangle is a 3-dancer formation consisting of 2 Base dancers and an Apex dancer. 
EN: 10  In a 
Tandem-Based Triangle the Base dancers form a Generalized Tandem; 
  in a 
Wave-Based Triangle, the Base dancers form a Generalized Couple. 
EN: 20 
| Triangle IDENTIFICATION  (from selected setups): EN: 50 
 |   |  |   |  |   |  | Galaxy |  | Hourglass |  | 1/4 Diamond setup | 
 | 
 Note: The Base dancers need not be adjacent.  E.g., from the Hourglass
  formation shown above, the Base dancers of the Wave-Based Triangle are far
  apart. 
EN: 60 
Triangle Circulate [C1]:
 From a Triangle.  
  Move forward to the next position within the Triangle, turning as necessary 
  to take the original facing direction (or original opposite facing direction, 
  if it is a facing Triangle Circulate) of the dancer who was originally there. 
EN: 70  
 Note: As with a Box Circulate or Diamond Circulate, when doing a Triangle
  Circulate, maintain the handedness of the formation 
  (i.e., keep the same shoulder toward the Center of the Triangle). 
EN: 80 
Inpoint | Outpoint Triangle IDENTIFICATION [C1]:
 From Twin Diamonds: 
  the In | Out-Facing Point is the Apex of a Triangle.
  The other Point of the same Diamond must be facing the opposite direction. 
EN: 90 
| |   |  |   |  | Inpoint Triangles |  | Outpoint Triangles | 
 | 
Inside Triangle IDENTIFICATION [C1]:
 Ignoring the outside two dancers, there is a Triangle on each side. 
EN: 100  
Outside Triangle IDENTIFICATION [C1]:
 Ignoring the Very Centers, there is a Triangle on each side. 
EN: 110  
| Inside Triangles 
 | 
| Outside Triangles 
 | 
In | Out-Center Triangle IDENTIFICATION [C1V]:
 From Point-to-Point Diamonds.  
  The In | Out-Facing Center is the Apex of a Triangle.
  This identification is rarely used. 
EN: 120   
| |   |  |   |  | In-Center Triangles |  | Out-Center Triangles | 
 | 
anyone-Point Triangle IDENTIFICATION [C1V]:
 From Twin Diamonds.  
  This identification can be used when both points of the Diamond are facing the same
  direction. 
EN: 130 
| |   |  |   |  | Beau-Point Triangles |  | Belle-Point Triangles | 
 | 
anyone-Based Triangles  IDENTIFICATION [C1V]:
 From setups such as C1 Phantoms where there are several possible Triangles.  
  The 
anyone dancers are the Base dancers of a Triangle. 
EN: 140  
|   
 anyone-Based Triangle IDENTIFICATION: 
 
 | 
"L" FORMATION [C4]:
  
An "L" is a 3-dancer formation that can be obtained from a 2 x 2 after 
  removing any one of the dancers. 
EN: 558 
| |   |  | "L" FORMATION | 
 | |   |  |   |  | before "L" Circulate
 |  | after 
 | 
 |