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6-8 Accelerated 7 Unit 9 Lesson 9

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K-5 Math •6-8 Math 9-12 Math

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Accelerated 6 •Accelerated 7

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Unit 1 Unit 2 Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8 •Unit 9

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Lesson 1 Lesson 2 Lesson 3 Lesson 4 Lesson 5 Lesson 6 Lesson 7 Lesson 8 •Lesson 9 Lesson 10 Lesson 11 Lesson 12

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IM K-5 Math
IM 6-8 Math
IM 9-12 Math

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IM® 6-8 Math v.360, an IM v.360 curriculum, is ©2024 by Illustrative Mathematics®, and licensed under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).

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Lesson 9

9.1 Warm-up 9.2 Activity 9.3 Activity

Unit 9, Lesson 9

Deforestation at Scale

Accelerated 7

9.1

Warm-up

Scaling a Room

Here is a scale drawing of a room. The drawing has the following scale:

1 unit in the drawing represents 4 feet in the actual room.

Calculate the area of the actual room. Be prepared to explain your reasoning.

An irregular hexagon with five sides with labeled lengths. Going clockwise beginning at the top the sides are: a 3 unit horizontal line, a 1 unit vertical line, a 2.83 unit diagonal line to the right, a 1 unit vertical line, a 5 unit horizontal line (this is the bottom of the shape), and a 4 unit vertical line connecting back to the beginning.

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9.2

Activity

Making a Plan

Your teacher will give you two maps of the same place at different times. Work with your partner to make a plan of how you could decompose each map to find the area of forested land.

Note: while the maps are to scale, the trees are not.

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9.3

Activity

Deforestation and Reforestation

Use your plan from the earlier activity to answer these questions:

What is the forested area, in square feet, shown in the first map?
What is the forested area, in square feet, shown in the second map?
How much deforestation happened during this time?
Was there any reforestation during this time? Explain your reasoning.

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Glossary

None

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