China Naming Network - Eight-character query< - What are the formulas of triangle dart model, eight-character model and small flag?

What are the formulas of triangle dart model, eight-character model and small flag?

Without drawing, assuming that the largest angle in the dart is A and the angle forming a 360-degree angle with A is B, then B = the sum of all angles in the dart except Angle A.. If the figure is eight, suppose six angles are (a, b, c)(d, e, f), where c and d are diagonal, then A+B = E+F, and the flag is not.

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