Using the point M_c and the point H_c, construct a line c (rule W02);

% DET: points M_c and H_c are not the same

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

% NDG: points H_a and M_c are not the same

Using the circle k(M_c,A) and the line c, construct a point A and a point B (rule W04);

% NDG: line c and circle k(M_c,A) intersect

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

% DET: points H_a and B are not the same

Using the point H_c and the line c, construct a line h_c (rule W10b);

Using the line a and the line h_c, construct a point C (rule W03);

% NDG: lines a and h_c are not parallel

% DET: lines a and h_c are not the same