The following figures are not considered as polygons. The first figure is not a polygon because it's not closed. The second figure is not polygon because the endpoints doesn't intersect. The third figure is not a polygon because its sides cross in the middle.
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Answer:
The following figures are not considered as polygons. The first figure is not a polygon because it's not closed. The second figure is not polygon because the endpoints doesn't intersect. The third figure is not a polygon because its sides cross in the middle.
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