Overview of eccentricity 0:03
Find an equation for the ellipse that satisfies the given conditions: Eccentricity: √3/2, Foci on yaxis, Length of major axis:4 1:49
You try: Find an equation for the ellipse that satisfies the given conditions: Eccentricity: 1/3, Foci: (0, 2), (0, 2) 6:24

Eccentricity is a number that represents the stretch of an ellipse. The closer the eccentricity is the zero, the more circular it is and the closer the eccentricity is to 1, the more elongated or stretched it is. This video covers examples where the eccentricity and another piece of information are given and asks for the equation for the ellipse.

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