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_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 circle k(E_a,A) and the line h_a, construct a point A and a point H (rule W04);

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

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

% DET: points H_b and A 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 point H_a and the line h_a, construct a line a (rule W10a);

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

% NDG: lines a and b are not parallel

% DET: lines a and b are not the same

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

% NDG: lines h_b and a are not parallel

% DET: lines h_b and a are not the same