Using the point B and the point H_b, construct a line h_b (rule W02);

% DET: points B and H_b are not the same

Using the point H_b and the line h_b, construct a line b (rule W10a);

Using the point I and the line b, construct a circle k(I,P_a) (rule W11);

% NDG: point I is not incident to the line b

Using the circle k(I,P_a), the point B and the point I, construct a line c and a line a (rule W12);

% NDG: point B is outside the circle k(I,P_a)

Using the line c and the line b, construct a point A (rule W03);

% NDG: lines c and b are not parallel

% DET: lines c and b are not the same

Using the line b and the line a, construct a point C (rule W03);

% NDG: lines b and a are not parallel

% DET: lines b and a are not the same