Using the point H_b and the point E_a, construct a circle k(E_a,A) (rule W06);

% NDG: points H_b and E_a are not the same

Using the point H_b and the point E_c, construct a circle k(E_c,C) (rule W06);

% NDG: points H_b and E_c are not the same

Using the circle k(E_a,A), the circle k(E_c,C), the point H_b, the point E_a and the point E_c, construct a point H (rule W08);

% NDG: circles k(E_a,A) and k(E_c,C) intersect

% DET: circles k(E_a,A) and k(E_c,C) are not the same points H_b and H must be different

Using the point H and the point E_a, construct a point A (rule W01);

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

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

% DET: points E_c and H are not the same

Using the point H_b and the point H, construct a line h_b (rule W02);

% DET: points H_b and H are not the same

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

% NDG: line h_c and circle k(E_a,A) intersect

% DET: points H and H_c must be different

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

% DET: points A and H_c are not the same

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

% NDG: lines h_b and c are not parallel

% DET: lines h_b and c are not the same