Theory
Exercises
1. 
Say true or false
Difficulty: easy 
2

2. 
Find the radius of a sphere
Difficulty: easy 
3

3. 
Find the diameter of the sphere
Difficulty: easy 
3

4. 
Find the radius of the hemisphere
Difficulty: easy 
3

5. 
Calculate the surface areas of a hemisphere
Difficulty: medium 
4

6. 
Find the radius and surface area of a hemispherical solid
Difficulty: medium 
3

7. 
Determine the cost of tinplating the hemispherical bowl
Difficulty: medium 
4

8. 
Find the ratio of surface area of the balloons
Difficulty: medium 
4

9. 
How much money needed to buy the cloth
Difficulty: medium 
4

10. 
Evaluate the cost of manufacturing the footballs
Difficulty: medium 
4

11. 
Complete the table
Difficulty: hard 
6

12. 
Calculate the surface area and radius of the hemispherical glass dome
Difficulty: hard 
5

13. 
Find the increased percentage in surface area
Difficulty: hard 
4

Tests
1. 
Training test
Difficulty: medium 
9

2. 
Training test
Difficulty: medium 
10
