

Scale factor lesson 10
Presentation
•
Mathematics
•
7th Grade
•
Medium
Standards-aligned
Reem Eleskandrani
Used 74+ times
FREE Resource
2 Slides • 10 Questions
1
Scale factor lesson 10

2
notes: copy in your notebook
A scale factor is like the constant of proportionality. It’s still xY .
The y, the dependent variable is the model created or drawn and the x ( the independent) is the real life or actual measurement
3
Multiple Choice
If you want to find the scale factor from one figure to another, which formula should you use?
old/ new
drawing / actual
Actual / model
4
Multiple Choice
An area rug is 9 feet wide. In a photograph, the image of the rug is 3 inches wide. What was the scale factor used?
31
91
3
5
Multiple Choice
The Waccamaw Bridge is 60 meters long. The length of a model of the bridge is 15 cm long. What is the scale of the model?
41
151
601
6
Multiple Choice
7
Multiple Choice
Scale: 1cm.=7m The width of the backyard is 49 m, how wide is it in the drawing?
14 cm
7 cm
42 m
7 m
8
Multiple Choice
A blueprint was using a scale of 3cm=4.5 m. Which number represents the dependent?
3
4.5
7.5
neither
9
Multiple Choice
The scale drawing car length is 3 cm. If the scale is 1 cm:4 ft, what is the actual car length?
12 feet
16 feet
10 feet
4 feet
10
Multiple Choice
What fraction do we create to find the scale factor.
scaledoriginal
originalscaled
11
Multiple Choice
12
Multiple Choice
To make a toy car, a company made a smaller model of the toy car. They used the scale factor 3cm = 7cm. The model was 18 cm, what was the size of the toy car?
126 cm
42 cm
21 cm
54 cm
Scale factor lesson 10

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