1. Lesson Objective: Find the surface area volume of spheres.
Date:
12.6 Notes: Spheres
Lesson Objective: Find the surface area volume of spheres.
CCSS: G.GMD.1, 3
You will need: calculator
Real-World App: What was the circumference of the globe at the 2006 World Cup?
This is Jeopardy!!!: The volume of a cone with base circumference 8π m and height 5 m more than ½ the radius. Give answer in terms of π.

2. Lesson 1: The Anatomy of a Sphere
A. The earth is cut into two parts. What are the two parts?
B. What cuts the earth into the two parts?
C. What is the shape of the largest cross section made through the center of the earth?

3. Lesson 1: The Anatomy of a Sphere
Sphere: The locus of points in space that are a fixed distance from a given point called the center of a sphere.
Hemisphere: Half of a sphere.
Great Circle:
The circle that
divides a
sphere into
2 hemi-
spheres.

4. Lesson 2: The Surface Area of a Sphere
Surface Area of Sphere, S: Equals the area of 4 circles
Ssphere = 4πr2

5. Lesson 2: The Surface Area of a Sphere
Surface Area of Sphere, S: Equals the area of 4 circles
Ssphere = 4πr2
Find the surface area of
the sphere in terms of π
and rounded to the near-
est hundredth.
Draw the sphere. Will use it in Lesson 3.

6. Lesson 3: The Volume of a Sphere
Volume of Sphere, V: The sum of pyramids that make up a sphere
Vsphere = 4/3πr3

7. Lesson 3: The Volume of a Sphere
Vsphere = 4/3πr3

8. Lesson 3: The Volume of a Sphere
Find the volume of the sphere from Lesson 2 in terms of π and rounded to the nearest hundredths.

9. Lesson 4: Using the Great Circle
A. Find the surface area and volume.

10. Lesson 4: Using the Great Circle
B. The surface area and volume of a sphere with a great circle that has an area of 49π mi2.

11. Lesson 5: Real World App – A Soccer Ball Globe

12. 12.6: Do I Get It? Yes or No
Find the surface area and
the volume of the hemisphere.
Find the volume and
surface area of the sphere
to the right.
3. Find the volume of an ice cream cone if it has a diameter of 2” and height of 6” AND has a scoop of ice cream with diameter of 3” on top.