Union (set theory)

High school (ages 12+)
Mathematics & Numbers

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Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/union-set-theory

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the mathematician's full name?George Boole
2. What is the mathematician's birthplace?Lincoln, Lincolnshire, England
3. What is a union in set theory?A union is the collection of all distinct items that are in either set A, set B, or both. It combines two groups into one without repeating any item.
4. Why do we use the union symbol ∪?The symbol ∪ looks like a sideways U and shows that we are joining two sets together. It helps us write the idea of "or" in math.

Set Theory: A fundamental branch of mathematics dealing with collections of objects, their properties, and operations between them.
Boolean Algebra: A system of algebra in which variables represent logical propositions and operations correspond to logical connectives.
Element (∈): An individual object or member belonging to a set, indicated by the symbol ∈ (is an element of).
Venn Diagram: A diagram that uses overlapping circles to illustrate the logical relationships between sets and their operations.