Concept
Version 5
Created by Boundless
Parts of an Ellipse
Diagram of an ellipse
This diagram of a horizontal ellipse shows the ellipse itself in red, the center
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Ellipse_Properties_of_Directrix_and_String_Construction.svg."
https://en.wikipedia.org/wiki/Ellipse
Wikipedia
Public domain.