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Using the point C and the point Hc, construct a line hc (rule W02);
% DET: points C and Hc are not the same
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Using the point Hc and the line hc, construct a line c (rule W10a);
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Using the point I and the line c, construct a circle k(I,Pa) (rule W11);
% NDG: point I is not incident to the line c
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Using the circle k(I,Pa), the point C and the point I, construct a line a and a line b (rule W12);
% NDG: point C is outside the circle k(I,Pa)
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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
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Using the line c and the line b, construct a point A (rule W03);
% NDG: lines c and b are not parallel
% DET: lines c and b are not the same