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

Choose freely a point H_b on the circle k(M_a,B) (rule WOncircle)

Using the point H_b and the point M_a, construct a line m(H_bM_a) (rule W14);

% DET: points H_b and M_a are not the same

Using the point H_b and the point H_c, construct a line m(H_bH_c) (rule W14);

% DET: points H_b and H_c are not the same

Using the line m(H_bH_c) and the line m(H_bM_a), construct a point N (rule W03);

% NDG: lines m(H_bH_c) and m(H_bM_a) are not parallel

% DET: lines m(H_bH_c) and m(H_bM_a) are not the same

Choose freely a point B on the circle k(M_a,B) (rule WOncircle)

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

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

% DET: points B and H_b are not the same

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

% DET: points H_c and C are not the same

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

% NDG: lines h_b and h_c are not parallel

% DET: lines h_b and h_c are not the same

Using the point N and the point H, construct a point G (rule W01);

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