The document is from a math lesson on computing actual areas from scale drawings. It provides examples of finding scale factors from drawings and using them to determine actual areas. It asks students to check if their area calculations match the examples. The lesson closes by asking students how to find an actual area given a scale drawing and a situation where this would be useful.

1. Module 4.5 Lesson 4 Scale Area Problems.notebook
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Computing Actual Areas
from a Scale Drawing.
2/7/17Module 4.5, Lesson 4
HW: Page 27 #4
CRS 11 due tomorrow
Do Now

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Problem Set Solutions S.19

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Use the diagrams below to find the scale factor and then find
the area of each figure.
Example 1:
21

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Use the diagrams below to find the scale factor and then find
the area of each figure.
Example 2:
21

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Use the diagrams below to find the scale factor and then find
the area of each figure.
Example 3:
85

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85

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Does the actual area you found reflect the results we found from
Examples 1–3? Explain how you know.
86

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2
1
1
2
2
2 1
2
in.in.
in. in.
87

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88

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88

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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.

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