## Video Links 2-1

**Venn diagrams (time: 2:00)**

**Venn diagrams (time: 2:00)**

*This is a web-based instructional module on the algebra of sets.*

http://www.math-only-math.com/laws-of-algebra-of-sets.html

*Union of Sets:*

https://www.basic-mathematics.com/union-of-sets.html

*Intersection of Sets:*

https://www.basic-mathematics.com/intersection-of-sets.html

*Venn Diagrams for union and intersection:*

https://www.mathsisfun.com/sets/venn-diagrams.html… See the whole entry

- Denoting sets
- undefined term; set
- circular definition
- specifying sets
- description method
- roster method

- well-defined set
- terms
- members
- elements
- belong to
- contained in

- Sets of numbers
- natural numbers
- counting numbers
- integers
- rational numbers

- set-builder notation

- Equal and equivalent sets