I am not sure.
Google "Venn diagram" or "Venn diagram rules" maybe.
guess my rule with two rules. Having such as hard time understanding this and would like to be able to explain to my 2nd grader! home wor sheet has 2 circles joined togeather, rule A has 2 girls in it with glasses, in the middle there is another girl with glasses, in rule B there are 2 girls wth no glasses. So stuck on finding the rules and explaining this to him, does anyone know????? thanks!!!!!
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