Intro to Scale Factor

Dilations create SIMILAR figures, which means the dimensions (side lengths) of the images must be...

• proportional ratios

• exactly the same

• even numbers

• odd numbers

Tags

CCSS.8.G.A.3

SCALE FACTOR describes the number that is multiplied by a pre-image that determines...

• how many times bigger an image gets

• how many times smaller an image gets

• how many times bigger or smaller an image gets

Tags

CCSS.7.G.A.1

Why does the scale factor of "1" NOT result in a dilation?

• making an image 1 times larger would not change its size, therefore it would remain the same/congruent image

• 1 cannot be a scale factor because it is not a fraction

• 1 cannot be a scale factor because it is not a decimal

Tags

CCSS.8.G.A.3

Which scale factor below would result in a dilation that is smaller than the pre-image?

• 0.5

• 3.5

• 2

• 4

Tags

CCSS.8.G.A.3

Which of the following scale factors could have possibly created the dilation shown?

• 
• 
• 
• 

Tags

CCSS.8.G.A.3

What scale factor was used in this magnifying glass?

• 10

• 5

• 2.5

• 2

Tags

CCSS.7.G.A.1

Which of the following transformations results in SIMILAR (not congruent) figures?

• translation

• reflection

• rotation

• dilation

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

Which transformation results in images that are NOT congruent?

• dilation

• translation

• reflection

• rotation

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Which image was the original/pre-image?

• ABCD (blue/larger)

• A'B'C'D' (orange/smaller)

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

Which of the following statements are true about the dilation that occurred? Select all that apply.

• the pre-image increased in size

• the pre-image decreased in size

• the length of AB to A'B' increased from 2 to 4

• the length of AB to A'B' decreased from 4 to 2

• the scale factor used for this dilation was 1/2 or 0.5

Tags

CCSS.8.G.A.3