Using the point E_c and the point H_c, construct a line h_c (rule W02);

% DET: points E_c and H_c are not the same

Using the point H_c and the point E_b, construct a circle k(E_b,B) (rule W06);

% NDG: points H_c and E_b are not the same

Using the circle k(E_b,B), the line h_c, the point E_b and the point H_c, construct a point H (rule W05);

% NDG: line h_c and circle k(E_b,B) intersect

% DET: points H_c and H must be different

Using the point H and the point E_b, construct a point B (rule W01);

Using the point E_c and the point H, construct a point C (rule W01);

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

% DET: points H_c and B are not the same

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

% DET: points B and C are not the same

Using the circle k(E_b,B), the line a, the point E_b and the point B, construct a point H_a (rule W05);

% NDG: line a and circle k(E_b,B) intersect

% DET: points B and H_a must be different

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

% DET: points H and H_a are not the same

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

% NDG: lines c and h_a are not parallel

% DET: lines c and h_a are not the same