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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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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 Ta, construct a line sa (rule W02);
% DET: points A and Ta are not the same
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Using the point Ha, the point A, the point Ta, the line sa and the line ha, construct a line AO (rule W17);
% NDG: points A and Ta are not the same points Ha and A are not the same
% DET: points A 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 B and the point A, construct a point Mc (rule W01);
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Using the point B and the point A, construct a line c (rule W02);
% DET: points B and A are not the same
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Using the point Mc and the line c, construct a line mc (rule W10b);
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Using the line mc and the line AO, construct a point O (rule W03);
% NDG: lines mc and AO are not parallel
% DET: lines mc and AO are not the same
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Using the point B and the point O, construct a circle k(O,C) (rule W06);
% NDG: points B and O are not the same
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Using the circle k(O,C), the line a, the point O and the point B, construct a point C (rule W05);
% NDG: line a and circle k(O,C) intersect
% DET: points B and C must be different