# Diagram types...

**URL:** <https://boards.straightdope.com/t/diagram-types/129240>\
**Category:** Factual Questions\
**Created:** [September 23, 2002, 5:30am UTC](https://boards.straightdope.com/t/diagram-types/129240 "2002-09-23T05:30:30Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Speaker\_for\_the\_Dead](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Speaker\_for\_the\_Dead](https://boards.straightdope.com/u/Speaker_for_the_Dead)\
**Post date:** [September 23, 2002, 5:30am UTC](https://boards.straightdope.com/t/diagram-types/129240/1 "2002-09-23T05:30:30Z")

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I’m at a loss for the name of the kind of diagram that has concentric circles to represent relationships. Any ideas? Google didn’t help.

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**Author:** ![ultrafilter](https://avatars.discourse-cdn.com/v4/letter/u/3d9bf3/32.png) [@ultrafilter](https://boards.straightdope.com/u/ultrafilter)\
**Post date:** [September 23, 2002, 5:49am UTC](https://boards.straightdope.com/t/diagram-types/129240/2 "2002-09-23T05:49:55Z")

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Are you thinking of Venn diagrams, used to indicate set membership?

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**Author:** ![Speaker\_for\_the\_Dead](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Speaker\_for\_the\_Dead](https://boards.straightdope.com/u/Speaker_for_the_Dead)\
**Post date:** [September 23, 2002, 5:59am UTC](https://boards.straightdope.com/t/diagram-types/129240/3 "2002-09-23T05:59:28Z")

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No, that’s the problem… they’re not Venn… they’re concentric circles… like a target.

Thanks, though.

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**Author:** ![John\_Kentzel-Griffin](https://avatars.discourse-cdn.com/v4/letter/j/ccd318/32.png) [@John\_Kentzel-Griffin](https://boards.straightdope.com/u/John_Kentzel-Griffin)\
**Post date:** [September 23, 2002, 6:08am UTC](https://boards.straightdope.com/t/diagram-types/129240/4 "2002-09-23T06:08:41Z")

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I can’t imagine what relationship concentric circles could show besides inclusion. Can you give us another hint?

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**Author:** ![Nametag](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/nametag/32/406_2.png) [@Nametag](https://boards.straightdope.com/u/Nametag)\
**Post date:** [September 23, 2002, 6:09am UTC](https://boards.straightdope.com/t/diagram-types/129240/5 "2002-09-23T06:09:10Z")

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Relationships between what?

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**Author:** ![ratatoskK](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/ratatoskk/32/2987_2.png) [@ratatoskK](https://boards.straightdope.com/u/ratatoskK)\
**Post date:** [September 23, 2002, 11:34am UTC](https://boards.straightdope.com/t/diagram-types/129240/6 "2002-09-23T11:34:55Z")

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Venn diagrams can be concentric if the inner entity is completely contained within the outer entity.

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**Author:** ![Speaker\_for\_the\_Dead](https://avatars.discourse-cdn.com/v4/letter/s/c77e96/32.png) [@Speaker\_for\_the\_Dead](https://boards.straightdope.com/u/Speaker_for_the_Dead)\
**Post date:** [September 23, 2002, 2:16pm UTC](https://boards.straightdope.com/t/diagram-types/129240/7 "2002-09-23T14:16:51Z")

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Thanks, ratatoskK, I suppose I’ll just have to use Venn 🙂