Euler circle may refer to:
- Nine-point circle, a circle that can be constructed for any given triangle
- Euler diagram, a diagrammatic means of representing propositions and their relationships
Famous quotes containing the word circle:
“we are the circle of the crazy ladies
who sit in the lounge of the mental house
and smile at the smiling woman
who passes us each a bell,”
—Anne Sexton (1928–1974)