Triangle FORMATION [C1]:
A Triangle is a 3-dancer formation consisting of 2 Base dancers and an Apex dancer.
In a Tandem-Based Triangle the Base dancers form a Generalized Tandem; 
  in a Wave-Based Triangle, the Base dancers form a Generalized Couple.
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 Triangle IDENTIFICATION (from selected setups):   
 
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 |  | Galaxy |   | Hourglass |   | 1/4 Diamond setup |   
 
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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.
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. 
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).
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.
 
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 |  | Inpoint Triangles |   | Outpoint Triangles |   
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Inside Triangle IDENTIFICATION [C1]:
Ignoring the outside two dancers, there is a Triangle on each side. 
Outside Triangle IDENTIFICATION [C1]:
Ignoring the Very Centers, there is a Triangle on each side. 
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 Inside Triangles    | 
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 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.  
 
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 |  | In-Center Triangles |   | Out-Center Triangles |   
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anyone-Point Triangle IDENTIFICATION [C1V]:
From Twin Diamonds.  
  This identification can be used when both points of the Diamond are facing the same
  direction.
 
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 |  | Beau-Point Triangles |   | Belle-Point Triangles |   
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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. 
In the following diagrams, 
 = Boy and = Girl.
 anyone-Based Triangle IDENTIFICATION:   
 
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"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.
 
 |  | "L" FORMATION |   
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 |  before "L" Circulate |   | after
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