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To find the leg reaction forces on a three-leg round table with a mass placed on it, you can use the principle of moments (torque). First, identify the location of the applied load (the mass) and the positions of the three legs. By taking moments about one of the legs, you can calculate the reaction forces at the other two legs, ensuring that the sum of the moments around that leg equals zero. Finally, apply the condition that the sum of the vertical forces must also equal zero to solve for the reaction forces at each leg.

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