Assertion: ellipse | /r/HasProperty | central
Facets:
value: with canonical equation
type: OTHER
value: to the shape
type: OTHER
Source sentences:
text: Foci are two points in an ellipse that are central to the shape.
text: An ellipse is a central second-order curve with canonical equation $$ \frac{x^2}{a^2} + \frac{y^2}{b^2}