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Larry saw Javon’s incomplete Venn diagram below, and he wants to finish it. However, he does not know the condition that each circle represents. Determine a possible label for each circle, and place two more shapes into the diagram.

Venn diagram with 2 circles that overlap, each labeled with a question mark. In the left circle but not in the overlapping portion, is a triangle where each side has 1 tick mark. In the overlapping section, is a quadrilateral where each side has 1 tick mark.

What characteristics do the shapes have in common? How are they different?