Palm Reader
A palm reader cares only whether the triangle formed by palm lines reveals the hand's curvature.
Use this cartoon
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/2021-01-01-palm-reader/ (CC BY-NC 4.0)Transcript
Palm reader: "Wow! Your heart line, fate line, and life line form a triangle!" Client: "What does that mean?" Palm reader: "It means their angular defect will tell us whether your hand is Euclidean!"
[Caption] "The hardest thing about being a palm reader, I find, is nobody wants to hear the truth."