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

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

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

% DET: points C and B are not the same

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

% DET: points E_b and H are not the same

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

% NDG: points C and E_c are not the same

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

% NDG: line a and circle k(E_c,C) intersect

% DET: points C and H_a must be different

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

% DET: points H_a and H are not the same

Using the circle k(E_c,C), the line h_b, the point E_c and the point H, construct a point H_b (rule W05);

% NDG: line h_b and circle k(E_c,C) intersect

% DET: points H and H_b must be different

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

% DET: points H_b and C are not the same

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

% NDG: lines h_a and b are not parallel

% DET: lines h_a and b are not the same