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

% DET: points O and M_a are not the same

Using the point O and the point M_c, construct a line m_c (rule W02);

% DET: points O and M_c are not the same

Using the point M_a and the line m_a, construct a line a (rule W10a);

Using the point M_c and the line m_c, construct a line c (rule W10a);

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

% NDG: lines c and a are not parallel

% DET: lines c and a are not the same

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

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