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_b and the point M_a, construct a circle k(M_a,B) (rule W06);

% NDG: points H_b and M_a are not the same

Using the circle k(M_a,B), the line h_b, the point M_a and the point H_b, construct a point B (rule W05);

% NDG: line h_b and circle k(M_a,B) intersect

% DET: points H_b and B must be different

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

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

% DET: points H and C are not the same

Using the circle k(M_a,B), the line h_c, the point M_a and the point C, construct a point H_c (rule W05);

% NDG: line h_c and circle k(M_a,B) intersect

% DET: points C and H_c must be different

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

% DET: points B and H_c are not the same

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

% NDG: lines b and c are not parallel

% DET: lines b and c are not the same