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

% DET: points E_a and H_a are not the same

Using the point H_a and the line h_a, construct a line a (rule W10a);

Choose freely a point C on the line a (rule WOnline2)

Choose freely a point A on the line h_a (rule WOnline1)

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

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

% DET: points A and C are not the same

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

% NDG: points A and E_a are not the same

Using the circle k(E_a,A), the line b, the point E_a and the point A, construct a point H_b (rule W05);

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

% DET: points A and H_b must be different

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

% DET: points H and H_b are not the same

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

% NDG: lines a and h_b are not parallel

% DET: lines a and h_b are not the same