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If a x1 y1 b x2 y2 and x3 y3 are the vertices of a
If a x1 y1 b x2 y2 and x3 y3 are the vertices of a pictures 5
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If a x1 y1 b x2 y2 and x3 y3 are the vertices of
If a x1 y1 b x2 y2 and x3 y3 are the vertices of a
