1. Scale Drawings and Models
Lesson 6-3 Pages
Scale Drawings and Models
Lesson Check 6-2

2. What you will learn! How to use scale drawing.
How to construct scale drawings.

3. Vocabulary
Scale drawing
Scale model
Scale
Scale factor

4. What you really need to know!
A scale gives the relationship between the measurements on the drawing or model and the measurements of the real object.

6. A map has a scale of 1 inch = 8 miles.
Example 1:
A map has a scale of 1 inch = 8 miles.
Two towns are 3.25 inches apart on the map.
a. What is the actual distance between the two towns?

7. 1•d = 8•3.25
d = 26 miles

8. A map has a scale of 1 inch = 8 miles.
b. What is the scale factor?

9. 8 miles must be changed to inches!
8 x 63,360 = 506,880

11. Example 2:
A model car is 4 inches long. The actual car is 12 feet long. What is the scale of the model?
1 inch = 3 feet

12. Example 3:
Sheila is designing a patio that is 16 feet long and 14 feet wide. Make a scale drawing of the patio. Use a scale of 0.5 inches = 4 feet.

13. 0.5 inches = 4 feet. L = 2 inches W = 1.75 inches
16 feet long and 14 feet wide.
0.5 inches = 4 feet.
L = 2 inches
W = 1.75 inches

14. 2 inches
1.75 inches

15. Page
Guided Practice
#’s 3-7

17. 0.5 inches = 10 feet. L = 3/4 inch W = 0.5 inch
15 feet long and 10 feet wide.
0.5 inches = 10 feet.
L = 3/4 inch
W = 0.5 inch

18. 3/4 inch
1/2 inch

19. Pages 276-278 with someone at home and study examples!
Read:
Pages with someone at home and study examples!

20. #’s 8-20 all #’s 23-44 Skip #25 Homework: Pages 279-280
Lesson Check 6-3

24. Page
737
Lesson 6-3

25. Lesson Check 6-3