Using the point A and the point G, construct a point M_a (rule W01);

Using the point A and the point T_a, construct a line s_a (rule W02);

% DET: points A and T_a are not the same

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

% DET: points T_a and M_a are not the same

Using the point M_a and the line a, construct a line m_a (rule W10b);

Using the line m_a and the line s_a, construct a point N_a (rule W03);

% NDG: lines m_a and s_a are not parallel

% DET: lines m_a and s_a are not the same

Using the point A and the point N_a, construct a line m(AN_a) (rule W14);

% DET: points A and N_a are not the same

Using the line m(AN_a) and the line m_a, construct a point O (rule W03);

% NDG: lines m(AN_a) and m_a are not parallel

% DET: lines m(AN_a) and m_a are not the same

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 a, construct a point C and a point B (rule W04);

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