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

% DET: points M_b and H_b are not the same

Using the point M_b and the line b, construct a line m_b (rule W10b);

Choose freely a point O on the line m_b (rule WOnline2)

Using the point H_b and the line b, construct a line h_b (rule W10b);

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

Using the point A and the point M_b, construct a point C (rule W01);

Using the point A and the point O, construct a circle k(O,C) (rule W06);

% NDG: points A and O are not the same

Using the circle k(O,C) and the line h_b, construct a point B_k and a point B (rule W04);

% NDG: line h_b and circle k(O,C) intersect