Assertion: sphere's surface area | /r/HasProperty | equal
Facets:
value: to 4πr²
type: OTHER
Source sentences:
text: The surface area of a sphere is defined as the amount of region covered by the surface of a sphere and is equal to 4πr².
text: In his work, Archimedes showed that the surface area of a cylinder is equal to:
text: In modern terms, this means that the surface area is equal to: