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A x1 y1 b x2 y2 c x3 y3 are the vertices of a triangle
A x1 y1 b x2 y2 c x3 y3 are the vertices of a triangle pictures 5
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A x1 y1 b x2 y2 c x3 y3 are the vertices of a
A x1 y1 b x2 y2 c x3 y3 are the vertices of a triangle
