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 point H_a and the point M_b, construct a circle k(M_b,C) (rule W06);

% NDG: points H_a and M_b are not the same

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

% NDG: line h_a and circle k(M_b,C) intersect

% DET: points H_a and A must be different

Using the point A and the point M_b, construct a point C (rule W01);

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

% DET: points H_a 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_b,C), the line h_c, the point M_b and the point C, construct a point H_c (rule W05);

% NDG: line h_c and circle k(M_b,C) intersect

% DET: points C and H_c must be different

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

% DET: points A and H_c are not the same

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

% NDG: lines a and c are not parallel

% DET: lines a and c are not the same