Using the point A and the point H_c, construct a line c (rule W02);

% DET: points A and H_c are not the same

Using the point H_c and the line c, construct a line h_c (rule W10b);

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

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

Using the circle k(I,P_a), the point A, the point I and the line c, construct a line b (rule W13);

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

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

% NDG: lines b and h_c are not parallel

% DET: lines b and h_c are not the same

Using the circle k(I,P_a), the point C, the point I and the line b, construct a line a (rule W13);

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

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

% NDG: lines a and c are not parallel

% DET: lines a and c are not the same