notes

1. Module 7.1 Lessons 19­20.notebook
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Computing Actual Areas
from a Scale Drawing.
Do Now: Lesson 18 Exit Ticket
9/29/15Module 7.1, Lessons 19-20
HW: Lesson 19 Problem Set #4
End of Module Exam Friday

2. Module 7.1 Lessons 19­20.notebook
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3. Module 7.1 Lessons 19­20.notebook
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Problem Set Solutions S.82

4. Module 7.1 Lessons 19­20.notebook
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Use the diagrams below to find the scale factor and then find
the area of each figure.
Example 1:
S.84

5. Module 7.1 Lessons 19­20.notebook
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Use the diagrams below to find the scale factor and then find
the area of each figure.
Example 2:
S.84

6. Module 7.1 Lessons 19­20.notebook
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Use the diagrams below to find the scale factor and then find
the area of each figure.
Example 3:
S.85

7. Module 7.1 Lessons 19­20.notebook
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S.85

8. Module 7.1 Lessons 19­20.notebook
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9. Module 7.1 Lessons 19­20.notebook
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Does the actual area you found reflect the results we found from
Examples 1–3? Explain how you know.
S.85

10. Module 7.1 Lessons 19­20.notebook
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Closing:
1.) When given a scale drawing, how do we go about finding
the area of the actual object?
2.) Describe a situation where you might need to know the
area of an object given a scale drawing or scale model.

11. Module 7.1 Lessons 19­20.notebook
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S.91

12. Module 7.1 Lessons 19­20.notebook
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Desk Bean Bag
Smart
Baord
Group
Table
36 in
24 in
24 in
24 in
60 in
36 in
60 in
S.91

13. Module 7.1 Lessons 19­20.notebook
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336 in
312 in
60 in 36 in
Desk Bean Bag
Smart
Baord
Group
Table
36 in
24 in
24 in
24 in
60 in
36 in
60 in
S.91

14. Module 7.1 Lessons 19­20.notebook
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S.92

15. Module 7.1 Lessons 19­20.notebook
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Desk Rug Bean Bag
Group
Table
2160 in2
576 in211520 in2
864 in2
104832 in2
Scale Factor =
Ratio of Areas =
Equation for areas:
S.93

16. Module 7.1 Lessons 19­20.notebook
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Closing Questions:
• Why are scale drawings used in
construction and design projects?
• What were the biggest challenges
you faced when creating your floor
plan? How did you overcome these
challenges?
• How can we double check our area
calculations?

17. Module 7.1 Lessons 19­20.notebook
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18. Module 7.1 Lessons 19­20.notebook
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