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We have placed two counters in regions formed by joining the vertices of the
hexagon ABCDEF. Note that each counter is inside more than one triangle whose
vertices are vertices of the hexagon.
Which triangles whose vertices are vertices of the hexagon are the counters
in?
What is the least number of counters needed to ensure that every triangle
whose vertices are vertices of the hexagon has at least one counter inside it?
Where should the counters be placed for this to happen?
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