# Scale Drawings

### New York State Common Core Math Geometry, Module 2, Lesson 1

Student Outcomes

• Students review properties of scale drawings and are able to create them.

Scale Drawings

Classwork

Opening Exercises

Above is a picture of a bicycle. Which of the images below appears to be a well-scaled image of the original? Why?

Example 1

Use construction tools to create a scale drawing of β³ π΄π΅πΆ with a scale factor of π = 2.

Exercise 1

1. Use construction tools to create a scale drawing of β³ π·πΈπΉ with a scale factor of π = 3. What properties does your scale drawing share with the original figure? Explain how you know.

Example 2

Use construction tools to create a scale drawing of β³ πππ with a scale factor of π = 1/2

Exercises 2β4

1. Use construction tools to create a scale drawing of β³ πππ with a scale factor of π = 1/4. What properties do the scale drawing and the original figure share? Explain how you know.
2. Triangle πΈπΉπΊ is provided below, and one angle of scale drawing β³ πΈβ²πΉβ²πΊβ² is also provided. Use construction tools to complete the scale drawing so that the scale factor is π = 3. What properties do the scale drawing and the original figure share? Explain how you know.
3. Triangle π΄π΅πΆ is provided below, and one side of scale drawing β³ π΄β²π΅β²πΆβ² is also provided. Use construction tools to complete the scale drawing and determine the scale factor.

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