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# Module 1 lesson 21

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• 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 1
• 2. Module 1 Lesson 21.notebook October 17, 2013 2
• 3. Module 1 Lesson 21.notebook October 17, 2013 3
• 4. Module 1 Lesson 21.notebook October 17, 2013 Problem Set Sample Solution continued... 4
• 5. Module 1 Lesson 21.notebook October 17, 2013 Problem Set Sample Solution continued... 5
• 6. Module 1 Lesson 21.notebook October 17, 2013 Problem Set Sample Solution continued... 6
• 7. Module 1 Lesson 21.notebook October 17, 2013 Problem Set Sample Solution continued... 7
• 8. Module 1 Lesson 21.notebook October 17, 2013 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? 8
• 9. Module 1 Lesson 21.notebook October 17, 2013 9
• 10. Module 1 Lesson 21.notebook October 17, 2013 10
• 11. Module 1 Lesson 21.notebook 1 3 1 October 17, 2013 3 4 1 2 2 3 3 2 4 11
• 12. Module 1 Lesson 21.notebook Reduction October 17, 2013 Enlargements 12
• 13. Module 1 Lesson 21.notebook October 17, 2013 13
• 14. Module 1 Lesson 21.notebook October 17, 2013 14
• 15. Module 1 Lesson 21.notebook October 17, 2013 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? 15
• 16. Module 1 Lesson 21.notebook October 17, 2013 16
• 17. Module 1 Lesson 21.notebook October 17, 2013 17