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It is the number of triangles : the number of circles.
(11!) / (4!) (3!) (2!) (2!) = 69,300distinguishable arrangements
Triangles, spheres, pentagons, cylinders, circles, ellipses, the Mandelbrot Set, etc.
The ratio of the two legs is 1 : 4.
1 triangle = 3 angles so 4 triangles = 4 x 3 = 12 angles unless some triangles are within others