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

% DET: points B and H_a are not the same

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

% DET: points B and H_c are not the same

Using the point H_a and the line a, construct a line h_a (rule W10b);

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

% NDG: lines h_a and c are not parallel

% DET: lines h_a and c are not the same

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

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

% NDG: lines h_c and a are not parallel

% DET: lines h_c and a are not the same