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Eccentricity (mathematics) - Wikipedia
Eccentricity Definition & Meaning - Merriam-Webster
Eccentricity - Math is Fun
Eccentricity - Meaning, Definition | Eccentricity Formula
Eccentricity - Definition, Formula and Examples - BYJU'S
Eccentricity -- from Wolfram MathWorld
Eccentricity - Vocab, Definition, and Must Know Facts - Fiveable