Scale Drawing Lesson Plan 7th Grade

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Illustrative Math
Form vii

Lesson 9: Creating Calibration Drawings

Let's create our own scale drawings.

Illustrative Math Unit vii.1, Lesson 9 (printable worksheets)

Lesson 9 Summary

The following diagram shows how different scales affect the lengths in the scale drawing.

Lesson ix.1 Number Talk: Which is Greater?

Without calculating, decide which quotient is larger.
11 ÷ 23 or 7 ÷ 13
0.63 ÷ ii or 0.55 ÷ 3
15 ÷ 1/three or xv ÷ 1/iv

• See Video for Whole Lesson

Lesson 9.two Sleeping accommodation Flooring Plan

Noah made a crude sketch of the layout of his room (not a scale drawing).

1. Noah wants to create a flooring plan that is a scale cartoon. The actual length of Wall C is 4 m. Noah draws a segment 16 cm long to represent Wall C. What calibration is he using? Explain or prove your reasoning.
2. Find some other way to express the scale.
3. Suspension and discuss your responses with a partner. How do your scales compare?
4. The bodily lengths of Wall A, Wall B, and Wall D are 2.5 m, two.75 thousand, and 3.75 one thousand. Determine how long these walls volition be on Noah's scale flooring plan.
5. Use the Point tool and the Segment tool and the Segment tool
   Open Applet

Are you lot ready for more?

Jada finds a map that says, "Notation: This map is not to scale." What do yous call up this means? Why is this data of import?

• Testify Answer

  Not to calibration means we cannot use the distances on the map to discover the bodily distances between locations.

Lesson 9.iii Two Maps of Utah

A rectangle around Utah is almost 270 miles wide and near 350 miles alpine. The upper correct corner that is missing is about 110 miles wide and virtually seventy miles tall.
Make a scale drawing of Utah where 1 centimeter represents 50 miles.
Make a scale drawing of Utah where one centimeter represents 75 miles.
How practise the 2 drawings compare? How does the pick of scale influence the drawing?

Lesson 9 Practice Issues

1. An paradigm of a book shown on a website is 1.5 inches broad and 3 inches tall on a computer monitor. The bodily book is ix inches wide. a. What scale is being used for the prototype? b. How tall is the actual book?
2. The flag of Colombia is a rectangle that is 6 ft long with three horizontal strips.
   The elevation stripe is two ft tall and is yellowish.
   The middle stripe is 1 ft tall and is blue.
   The bottom stripe is also 1 ft tall and is red.
   a. Create a scale drawing of the Colombian flag with a scale of ane cm to 2 ft.
   b. Create a scale drawing of the Colombian flag with a scale of ii cm to 1 ft.
   
3. These triangles are scaled copies of each other.
   For each pair of triangles listed, the expanse of the second triangle is how many times larger than the area of the first?
   a. Triangle G and Triangle F
   b. Triangle Yard and Triangle B
   c. Triangle B and Triangle F
   d. Triangle F and Triangle H
   e. Triangle Thousand and Triangle H
   f. Triangle H and Triangle B
   
4. Here is an unlabeled rectangle, followed by other quadrilaterals that are labeled.
   a. Select all quadrilaterals that are scaled copies of the unlabeled rectangle. Explain how you know.
   b. On graph newspaper, depict a different scaled version of the original rectangle.
   

The Open Up Resource math curriculum is costless to download from the Open up Resources website and is too available from Illustrative Mathematics.

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