Assertion: ellipse | /r/HasProperty | any plane section of a cone
Facets:
value: more precisely
type: DEGREE
Source sentences:
text: More precisely, an ellipse is any plane section of a cone, not containing the cone’s apex, and with a slope less than the slope of the lines on the cone.
text: Ellipse is any plane section of a cone , not containing the cone’s apex , and with a slope less than the slope of the lines on the cone.