1. Module 3 Lesson 21.notebook
Module 3 Lesson 21
AIM: Surface Area
February 24, 2014
Homework
Problem Set 21
#1 and 5
Do Now
Exit Ticket Lesson 20
1

2. Module 3 Lesson 21.notebook
February 24, 2014
2

3. Module 3 Lesson 21.notebook
February 24, 2014
3

4. Module 3 Lesson 21.notebook
February 24, 2014
4

5. Module 3 Lesson 21.notebook
February 24, 2014
Discussion:
1.) What is surface area?
2.) How do you find the surface area of a
three dimensional object?
Net: a two-dimensional representation
of a three dimensional object
5

6. Module 3 Lesson 21.notebook
February 24, 2014
6

7. Module 3 Lesson 21.notebook
February 24, 2014
7

8. Module 3 Lesson 21.notebook
February 24, 2014
8

9. Module 3 Lesson 21.notebook
February 24, 2014
Discussion:
1.) Are the bottom and top faces of a right
rectangular prism the bases of the prism?
2.) If we slice the right rectangular prism is half
along a diagonal of a base, the two halves are called
right triangular prisms. Why do you think they are
called triangular prisms?
3.) Why must the triangular faces be the bases of these prisms?
9

10. Module 3 Lesson 21.notebook
February 24, 2014
10

11. Module 3 Lesson 21.notebook
February 24, 2014
11

12. Module 3 Lesson 21.notebook
February 24, 2014
12

13. Module 3 Lesson 21.notebook
February 24, 2014
Practice:
The height of a right rectangular prism is 3.5 feet. The
length and width of the prism's bases are 3 feet and 5.5
feet. Use the formula SA = LA + 2B to find the surface
area of the right rectangular prism.
13

14. Module 3 Lesson 21.notebook
February 24, 2014
14

15. Module 3 Lesson 21.notebook
February 24, 2014
15