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

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

% DET: points C and M_a are not the same

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

% DET: points T_c 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