Assertion: ellipse's point | /r/CapableOf | fall on particular circle
Facets:
value: given a ratio of distances
type: OTHER
value: given b
type: OTHER
value: given two foci a
type: OTHER
Source sentences:
text: First, one must prove that, given two foci A and B and a ratio of distances, any point P satisfying the ratio of distances must fall on a particular circle.