This study investigates the hydrodynamic performance and wave-energy extraction capabilities of an articulated floating-plate wave-energy converter (WEC) consisting of multiple hinged segments. Using linear potential flow theory and the boundary-element method, we solve the boundary-value problem in two equivalent formulations: velocity potential and hydrodynamic pressure. The articulated structure is modeled using generalized modes that capture relative rotations at the hinges. For power absorption, we assume a linear power take-off (PTO) system at each hinge and analytically derive the optimal absorbed power in two-segment configurations. To demonstrate the accuracy of the implementation, the numerical results are validated against experimental data of a single plate and benchmark solutions for hinged systems. The results reveal a strong dependence of optimal capture efficiency on the hinge position of two-segment plates, with peak values exceeding unity when the hinge is shifted toward the upwave side following the zero-crossing locus of the imaginary part of the intrinsic admittance. Therefore, the hinge must be appropriately placed for maximizing the energy extraction in raft-type WECs.