Flashcard 11 - Geometry Flashcard Set for the Math Basics

\[SA_\text{sphere}=4\pi r^2\]

and

\[V_\text{sphere}=\frac{4}{3} \pi r^3\]

These two formulas are worth memorizing. If you get confused which is which, just remember that area has square units (so SA has the \(r^2\) in it) and volume has cubic units (so V has the \(r^3\) in it).