Assertion: sphere's radius | /r/HasProperty | distance
Facets:
value: from earth's center
type: LOCATION
value: to its surface
type: LOCATION
Source sentences:
text: = 4 π 2 R r {\displaystyle (2\pi r)(2\pi R)=4\pi ^{2}Rr} r = minor radius (radius of the tube), R = major radius (distance from center of tube to center of torus)
text: The Earth's radius is the distance from Earth's center to its surface, about 6,371 kilometers (3,959 mi).