Concept:Kinematic Indeterminacy:It is the total number of possible degrees of freedom of all the joints. Dk = 3J - r + h (For beam & portal frame) Dk = 2J - r + h (For truss structure) Where, Dk = Kinematic Indeterminacy, r = No. of unknown reactions h = No. of plastic hinges J = No. of joints Calculation:Given; J = 2 R = 1 + 3 = 4 (1 vertical reaction at roller support, and 1 vertical, 1 horizontal and 1 moment reaction at fixed support) h = 0 Dk = 3 × 2 - 4 = 2 Dk = 2