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Using the point A and the point Tb, construct a line b (rule W02);
% DET: points A and Tb are not the same
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Using the point Ta and the line b, construct a circle k(Ta,foot[Ta,c]) (rule W11);
% NDG: point Ta is not incident to the line b
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Using the circle k(Ta,foot[Ta,c]), the point A, the point Ta and the line b, construct a line c (rule W13);
% NDG: point A is outside the circle k(Ta,foot[Ta,c])
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Using the point Tb and the line c, construct a circle k(Tb,foot[Tb,c]) (rule W11);
% NDG: point Tb is not incident to the line c
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Using the circle k(Tb,foot[Tb,c]), the point Ta and the point Tb, construct a line a1 and a line a (rule W12);
% NDG: point Ta is outside the circle k(Tb,foot[Tb,c])
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Using the line a and the line b, construct a point C (rule W03);
% NDG: lines a and b are not parallel
% DET: lines a and b are not the same
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Using the line c and the line a, construct a point B (rule W03);
% NDG: lines c and a are not parallel
% DET: lines c and a are not the same