1. Spheres
Section 11-4
Holt McDougal Geometry
Holt Geometry

2. Warm Up Find each measurement.
1. the radius of circle M if the diameter is 25 cm
2. the circumference of circle X if the radius is in.
3. the area of circle T if the diameter is 26 ft
4. the circumference of circle N if the area is 625 cm2

3. A sphere is the locus of points in space that are a fixed distance from a given point called the center of a sphere. A radius of a sphere connects the center of the sphere to any point on the sphere. A hemisphere is half of a sphere. A great circle divides a sphere into two hemispheres

5. Find the volume of the sphere. Give your answer in terms of .

6. Find the diameter of a sphere with volume 36,000 cm3.

7. Find the volume of the hemisphere.

8. Find the radius of a sphere with volume 2304 ft3.

9. A sporting goods store sells exercise balls in two sizes, standard (22-in. diameter) and jumbo (34-in. diameter). How many times as great is the volume of a jumbo ball as the volume of a standard ball?

10. A hummingbird eyeball has a diameter of approximately 0. 6 cm
A hummingbird eyeball has a diameter of approximately 0.6 cm. How many times as great is the volume of a human eyeball as the volume of a hummingbird eyeball?

12. Find the surface area of a sphere with diameter 76 cm
Find the surface area of a sphere with diameter 76 cm. Give your answers in terms of .

13. Find the volume of a sphere with surface area 324 in2
Find the volume of a sphere with surface area 324 in2. Give your answers in terms of .

14. Find the surface area of a sphere with a great circle that has an area of 49 mi2.

15. Find the surface area of the sphere.

16. The radius of the sphere is multiplied by
The radius of the sphere is multiplied by . Describe the effect on the volume.

17. The radius of the sphere is divided by 3
The radius of the sphere is divided by 3. Describe the effect on the surface area.

18. Find the surface area and volume of the composite figure
Find the surface area and volume of the composite figure. Give your answer in terms of .

19. Find the surface area and volume of the composite figure.

20. Lesson Quiz: Part I
Find each measurement. Give your answers in terms of .
1. the volume and surface area
of the sphere
2. the volume and surface area of a sphere with great circle area 36 in2
3. the volume and surface area
of the hemisphere

21. Lesson Quiz: Part II
4. A sphere has radius 4. If the radius is multiplied by 5, describe what happens to the surface area.
5. Find the volume and surface area of the composite figure. Give your answer in terms of .