Assertion: ellipse's distance | /r/HasProperty | constant
Facets:
Source sentences:
text: An ellipse is a locus of a point which moves in such a way that its distance from a fixed point (focus) to its perpendicular distance from a fixed straight line (directrix) is constant.
text: The distance between any point on the circle and its center is constant, which is known as the radius.
text: In Euclidean geometry, an ellipse is usually defined as the bounded case of a conic section, or as the locus of the points $ P $ such that the distances to two fixed points is constant.
text: What makes them important is that the distance between the focus, the edge, and the other focus is constant for any point on the perimeter of the ellipse.
text: The only difference in the definition of a hyperbola and that of an ellipse is that the hyperbola is the difference of the distances from the foci that is constant and the ellipse is the sum of the distances from the foci that is constant.