Arithmetical sum of the moments of two forces about any point, is equal to the moments of their resultant about that point

Algebraic sum of the moments of two forces about any point, is equal to the moment of their resultant about that point

Arithmetical sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point

Algebraic sum of the moments of the forces about any point in their plane, is equal to the moment of their resultant about that point