Assertion: sphere | /r/HasProperty | orthogonal
Facets:
value: to all of them
type: OTHER
value: to its center
type: LOCATION
Source sentences:
text: The radical plane is the locus of the centers of all the spheres that are orthogonal to all the spheres in a pencil.
text: Moreover, a sphere orthogonal to any two spheres of a pencil of spheres is orthogonal to all of them and its center lies in the radical plane of the pencil.