I want to find the moments around points A and B in the following figure. Suppose the structure is fixed at the point where $F_{ax}$ and $F_{ay}$ are located. I consider A and B to be hinges so that the rigid links can rotate.
Is it plausible to calculate the external moment at points A and B with respect to the external forces, such that the structure remains in equilibrium?
I know that the moments in hinges are 0, but would external moments keep the structure in equilibrium?