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

% DET: points H_c and H are not the same

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

% NDG: points H_c and M_a are not the same

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

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

% DET: points H_c and C must be different

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

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

% DET: points H_c and B are not the same

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

% DET: points H and B are not the same

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

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

% DET: points B and H_b must be different

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

% NDG: lines c and b are not parallel

% DET: lines c and b are not the same