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

% DET: points B 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 T_b and the line c, construct a circle k(T_b,foot[T_b,c]) (rule W11);

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

Using the circle k(T_b,foot[T_b,c]), the point B, the point T_b and the line c, construct a line a (rule W13);

% NDG: point B is outside the circle k(T_b,foot[T_b,c])

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

% NDG: lines a and h_c are not parallel

% DET: lines a and h_c are not the same

Using the point T_b and the point C, construct a line b (rule W02);

% DET: points T_b and C are not the same

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