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Using the point Hc and the point Tc, construct a line c (rule W02);
% DET: points Hc and Tc are not the same
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Using the point Hc and the line c, construct a line hc (rule W10b);
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Choose freely a point C on the line hc (rule WOnline2)
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Using the point C and the point Tc, construct a line sc (rule W02);
% DET: points C and Tc are not the same
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Using the point Hc, the point C, the point Tc, the line sc and the line hc, construct a line CO (rule W17);
% NDG: points C and Tc are not the same points Hc and C are not the same
% DET: points C and Tc are not the same
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Choose freely a point A on the line c (rule WOnline1)
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Using the point A and the point C, construct a point Mb (rule W01);
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Using the point A and the point C, construct a line b (rule W02);
% DET: points A and C are not the same
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Using the point Mb and the line b, construct a line mb (rule W10b);
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Using the line mb and the line CO, construct a point O (rule W03);
% NDG: lines mb and CO are not parallel
% DET: lines mb and CO are not the same
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Using the point A and the point O, construct a circle k(O,C) (rule W06);
% NDG: points A and O are not the same
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Using the circle k(O,C), the line c, the point O and the point A, construct a point B (rule W05);
% NDG: line c and circle k(O,C) intersect
% DET: points A and B must be different