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

% DET: points H_c and T_c are not the same

Using the point H_c and the point M_a, construct a circle k(M_a,B) (rule W06);

% NDG: points H_c and M_a are not the same

Using the circle k(M_a,B), the line c, the point M_a and the point H_c, construct a point B (rule W05);

% NDG: line c and circle k(M_a,B) intersect

% DET: points H_c and B must be different

Using the point B and the point M_a, construct a point C (rule W01);

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

% DET: points M_a and B are not the same

Using the point T_c and the line a, construct a circle k(T_c,foot[T_c,b]) (rule W11);

% NDG: point T_c is not incident to the line a

Using the circle k(T_c,foot[T_c,b]), the point C, the point T_c and the line a, construct a line b (rule W13);

% NDG: point C is outside the circle k(T_c,foot[T_c,b])

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

% NDG: lines b and c are not parallel

% DET: lines b and c are not the same