What is the difference between ellipse and hyperbola?
An ellipse is a closed curve with e<1 (sum of focal distances constant); a hyperbola is an open two-branch curve with e>1 (difference of focal distances constant).
An ellipse is a closed curve with e<1 (sum of focal distances constant); a hyperbola is an open two-branch curve with e>1 (difference of focal distances constant). A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.
Key point
ellipse vs hyperbola
Tap to watch or see it right here — the app stays open (it only opens a quick search if nothing embeddable is found).