10.9 The Surface Area of a Sphere
1. The surface area of a sphere is the amount
of material it takes to cover the sphere without
any overlapping. The formula for the surface
area is as follows:
Surface Area =
In order to find the surface area of a sphere,
you only need to know the value of the
2. Find the surface area of a sphere
whose radius is 5 cm.
3. If the volume of a sphere is 322 cm3.
What is the surface area of the sphere?
4. What is the surface area of a
sphere whose diameter is 24 cm?
5. Find the surface area of a sphere
with the given dimensions:
a) radius = 4 inches
b) diameter = 0.28km
c) Circumference of a great circle = 22
d) Volume = 288
cm
6. A Hall‐of‐Fame baseball player wants to
bronze the last home‐run ball he hit. The
radius of a ball is 1.5 inches. Find the area
of the surface to be bronzed.