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Using the point C and the point Mb, construct a point A (rule W01);
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Using the point C and the point Mb, construct a line b (rule W02);
% DET: points C and Mb are not the same
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Using the point Tc and the point A, construct a line c (rule W02);
% DET: points Tc and A are not the same
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Using the point Tc and the line b, construct a circle k(Tc,foot[Tc,b]) (rule W11);
% NDG: point Tc is not incident to the line b
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Using the circle k(Tc,foot[Tc,b]), the point C, the point Tc and the line b, construct a line a (rule W13);
% NDG: point C is outside the circle k(Tc,foot[Tc,b])
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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