Social Circle
Three levels of loneliness: a big circle of friends, a circle of radius zero, and arguing about the topology of your social circle.
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Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2018-05-08-social-circle/ (CC BY-NC 4.0)Transcript
[NOT LONELY] "Social circle" (circle of friends)
[LONELY] "Social circle of radius zero" (a single dot)
[VERY LONELY] "Debating the topology of your social circle": "Well, if it has genus zero, then it ain't a circle, now is it?"