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7th Grade Math / Lesson 4: Venn Diagrams

VENN DIAGRAMS
What will we be learning in this lesson?


  • In this lesson, you will learn what a venn diagram is and how it can be used.
Vocabulary words are found in this purple color throughout the lesson. Remember to put these in your notebook.


VENN DIAGRAMS


  • A venn diagram can be used to represent a collection of objects or events.



    Here is a venn diagram representing numbers. It consists of two ovals. One oval is labeled "Even Numbers" and the other oval is labeled "Numbers divisible by 3". The two ovals overlap because there are some numbers that fit into both categories.

    Even numbers                                                  Numbers divisible by 3
    2, 4, 6, 8, 10, 12,                                             3, 6, 9, 12, 15, 18,
    14, 16, 18

    The 6, 12, and 18 are in both lists so they need to be in the overlapping part.


VENN DIAGRAMS


  • Make a venn diagram for the following collections.

  • Use the days of the week:
    Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday

  • Make one oval "Days that start with 'S'" and the other oval "Days with 6 letters".



VENN DIAGRAMS


    Now consider each day and where it belongs in the diagram.

    Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday

  • Sunday starts with S and it has 6 letters - it belongs in the overlap
  • Monday has 6 letters
  • Tuesday doesn't start with S and has 7 letters - it doesn't belong at all
  • Wednesday doesn't belong
  • Thursday doesn't belong
  • Friday has 6 letters
  • Saturday starts with S


VENN DIAGRAMS


  • Sometimes there isn't an overlapping section.

  • Use the days of the week:
    Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday

  • Make one oval "Schooldays" and the other oval "Weekends".




  • The two categories of days are completely different from each other and they do not overlap


VENN DIAGRAMS


  • And sometimes the overlapping section is completely inside one of the ovals.

  • Use the days of the week:
    Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday

  • Make one oval "Schooldays" and the other oval "Days that start with 'T' ".



  • The only days that start with the letter 'T' are also school days.


  • Can you create a venn diagram for a certain collection?
  • Go back to the classroom to get to your homework and any other items you need to attend to.