Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Module 1- Lesson 19: Computing
Actual Areas from a Scale
Drawing
Hw: Lesson 19 Problem Set
#4
Do Now:
Lesson 18 Exit Ticket
Oct 29­9:20 AM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Lesson 18 Exit Ticket
A drawing of a surfboard in a catalog shows its length as 8 4/9 inches. Find
the actual length of the surfboard if 1/2 inch length on the drawing
corresponds to 3/8 foot of actual length.
Oct 14­3:11 PM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Lesson 18 Problem Set
1. A toy company is redesigning their packaging for model cars. The graphic
design team needs to take the old image shown below and resize it so that 1/2
inch on the old packaging represents 1/3 inch on the new package. Find the
length of the image on the new package.
4. A model of a skyscraper is made so that 1 inch represents 75 feet. What is
the height of the actual building if the height of the model is 18 3/5 inches?
Oct 14­3:04 PM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Lesson 18 Problem Set continued
6.The sponsor of a 5K run/walk for charity wishes to create a stamp of its
billboard to commemorate the event. If the sponsor uses a scale where 1 inch
represents 4 feet, and the billboard is a rectangle with a width of 14 feet and a
length of 48 feet, what will be the shape and size of the stamp?
7. Danielle is creating a scale drawing of her room. The rectangular room
measures 20 1/2 feet by 25 feet. If her drawing uses the scale where 1 inch
represents 2 feet of the actual room, will her drawing fit on an 8 1/2 in. by 11 in.
piece of paper?
Oct 14­3:09 PM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Use the diagrams below to find the scale factor and then find
the area of each figure.
Example 1:
Scale Ratio: ____
Actual Area: ____
Scale Drawing Area: ______
Ratio of Areas:____
Oct 7­10:17 AM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Use the diagrams below to find the scale factor and then find
the area of each figure.
Example 2:
Scale Ratio: ____
Actual Area: ____
Scale Drawing Area: ______
Ratio of Areas:____
Oct 7­10:17 AM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Use the diagrams below to find the scale factor and then find
the area of each figure.
Example 3:
Scale Ratio: ____
Actual Area: ____
Scale Drawing Area: ______
Ratio of Areas:____
Oct 7­10:17 AM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Example 4: They Said Yes!
The Student Government liked your half-court basketball plan. They have
asked you to calculate the actual area of the court so that they can estimate
the cost of the project.
Based on your drawing below, what will the area of the planned half-court be?
What did we find the actual lengths of the basketball court to be
yesterday and how do we use that to find area?
Oct 7­10:26 AM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Excercise 2:
2
1
2
1
in.
2 in.
1
2
in.
2 in.
Oct 7­10:29 AM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Oct 7­10:29 AM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Oct 7­10:31 AM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
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.
Oct 7­10:32 AM
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Module 1 Lesson 19 PARTIAL.notebook
October 15, 2015
Oct 14­9:22 PM
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