1. Module 1 Lesson 21.notebook
October 17, 2013
Module 1, Lesson 21
10/17/13
An Exercise in
Changing Scales
HW: Study for Quiz 2
Quiz 2 moved to Monday
Do Now: Complete the following table.
x
y
total
3.25
4
6
12
1
2
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2. Module 1 Lesson 21.notebook
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4. Module 1 Lesson 21.notebook
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Problem Set Sample Solution continued...
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5. Module 1 Lesson 21.notebook
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Problem Set Sample Solution continued...
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6. Module 1 Lesson 21.notebook
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Problem Set Sample Solution continued...
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7. Module 1 Lesson 21.notebook
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Problem Set Sample Solution continued...
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8. Module 1 Lesson 21.notebook
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Questions:
1.) Would this new scale create a larger or smaller scale drawing
as compared to the original?
2.) How would you use the scale factor between SD1 and SD2 to
calculate the new scale drawing lengths without using the original
measurements?
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11. Module 1 Lesson 21.notebook
1
3
1
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3
4
1
2
2
3
3
2
4
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12. Module 1 Lesson 21.notebook
Reduction
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Enlargements
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Closing:
Why might you want to produce a scale drawing of a different scale?
How do you produce another scale drawing given the original scale
drawing and a different scale?
How can you tell if a new scale drawing is a scale drawing of the
original figure?
How can the scale factor of the new drawing to the original figure
be determined?
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