# Definition:Conic Section/Reduced Form/Ellipse

< Definition:Conic Section | Reduced Form(Redirected from Definition:Reduced Form of Ellipse)

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## Definition

Let $K$ be an ellipse embedded in a cartesian coordinate plane.

$K$ is in **reduced form** if and only if:

- $(1)$ its major axis is aligned with the $x$-axis
- $(2)$ its minor axis is aligned with the $y$-axis.