A Triangular Box consists of a Diagonal Line of 3 and a dancer in a corner position of the 3 x 3 Matrix defined by the Diagonal Line. Work with these dancers in a Distorted Box. Triangular Boxes are most commonly used from Interlocked Blocks [C1].

A Triangular Box is a 4-dancer formation in the following shape:

From Interlocked Blocks, there are two Triangular Boxes: to find them, divide the formation in half along the phantom long diagonal. Alternatively, look for a Diagonal of 3, then find the lonesome dancer.

Other examples of Triangular Boxes:

Triangular Box Counter Rotate 1/4 :     before Triangular Box Counter Rotate 1/4   after