Using the point C and the point G, construct a point M_c (rule W01);

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

% DET: points C and H_b are not the same

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

% NDG: points H_b and M_c are not the same

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

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

% DET: points H_b and A must be different

Using the point G and the point A, construct a point M_a (rule W01);

Using the point C and the point M_a, construct a point B (rule W01);