Lesson 12.6: Surface Areas and Volumes of Spheres
Key Concepts: Surface Areas and Volumes of Spheres
Surface Area of a Sphere
S = 4πr²
Volume of a Sphere
V = (4/3)πr³
Hemisphere
- Surface area (total) = 3πr² (curved surface + base circle).
- Volume = (2/3)πr³.
Great Circle
A great circle is the intersection of a sphere and a plane through the center. Its circumference equals the circumference of the sphere.