The flat mechanism consists of rods 1; 2; 3; 4 and slider B or E or rods 1; 2; 3 and sliders B and E connected to each other and to fixed supports O₁, O₂ by hinges; point D is in the middle of rod AB. The lengths of the rods are, respectively, L₁=0.4m; L₂=1.2m; L₃=1.4m; L₄=0.6m. The position of the mechanism is determined by the given angles.

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