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

% DET: points B and T_c are not the same

Using the point T_c and the point I, construct a line s_c (rule W02);

% DET: points T_c and I are not the same

Using the point I and the line c, construct a circle k(I,P_a) (rule W11);

% NDG: point I is not incident to the line c

Using the circle k(I,P_a), the point B, the point I and the line c, construct a line a (rule W13);

% NDG: point B is outside the circle k(I,P_a)

Using the line a and the line s_c, construct a point C (rule W03);

% NDG: lines a and s_c are not parallel

% DET: lines a and s_c are not the same

Using the circle k(I,P_a), the point C, the point I and the line a, construct a line b (rule W13);

% NDG: point C is outside the circle k(I,P_a)

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