Lemma
EasySolid geometry
#792 · Geometry · Solid geometry

Skin of a sphere

Find the surface area of a sphere of radius .

~3 minAnswer checked instantlySolid geometry
Stuck? A gentle nudge
Something off?
Workspace
Your answer
Loading the math keyboard…

Type naturally — sqrt, pi, / and ^ become notation. Any equivalent form is accepted. Press Enter to check.