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Using the point Ha and the point Ta, construct a line a (rule W02);
% DET: points Ha and Ta are not the same
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Choose freely a point B on the line a (rule WOnline1)
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Using the point Ha and the line a, construct a line ha (rule W10b);
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Choose freely a point A on the line ha (rule WOnline2)
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Using the point A and the point B, construct a line c (rule W02);
% DET: points A and B are not the same
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Using the point Ta and the line c, construct a circle k(Ta,foot[Ta,c]) (rule W11);
% NDG: point Ta is not incident to the line c
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Using the circle k(Ta,foot[Ta,c]), the point A, the point Ta and the line c, construct a line b (rule W13);
% NDG: point A is outside the circle k(Ta,foot[Ta,c])
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Using the line b and the line a, construct a point C (rule W03);
% NDG: lines b and a are not parallel
% DET: lines b and a are not the same