Using the point H_b and the point M_c, construct a circle k(M_c,A) (rule W06);

% NDG: points H_b and M_c are not the same

Choose freely a point B on the circle k(M_c,A) (rule WOncircle)

Using the point B and the point M_c, construct a point A (rule W01);

Using the point H_b and the point A, construct a line b (rule W02);

% DET: points H_b and A are not the same

Choose freely a point C on the line b (rule WOnline1)