Finding Scale Factor

Module 2 - Finding Scale Factor

What is SCALE FACTOR? Identifying the Scale Factor between a figure and the scale drawing of that figure.

Important Information about Finding the Scale Factor

• If the second figure is LARGER than the original, then you will MULTIPLY and the scale factor is greater than 1. K>1

• If the second figure is SMALLER than the original, then you will DIVIDE and the scale factor is less than 1. K<1

How to Find the Scale Factor

Watch this video

Multiple Choice

_________ ________ is the number you multiply by the sides to create a similar figure.

• Corresponding Angle

• Scale Factor

• Mid Point

• Similar objects

Multiple Choice

If the second figure is larger than the original, the scale factor will be ______________.

• Greater than 1

• Less than 1

• 2

Multiple Choice

If the second figure is smaller than the original, the scale factor will be ______________.

• Greater than 1

• Less than 1

• Equal

• Congruent

Multiple Choice

All of these EXCEPT FOR ONE can be used to determine if two figures are similar. Which one is it?

• scale factor

• ratio of corresponding sides

• ratio of adjacent sides

• Finding the area of both figures

Multiple Choice

If the scale factor is greater than one, the new figure will be

• a reduction

• an enlargement

• a scale

• not proportional

Multiple Choice

If the scale factor is less than one, the new figure will be

• An enlargement

• A reduction

• A scale factor

• bigger

Multiple Choice

What is the formula for scale factor?

• ​

  $\frac{old}{new}$

• $\frac{new}{old}$

Multiple Choice

What is the scale factor from shape A to shape B?

• 1

• 2

• 3

• 4

Multiple Choice

What is the scale factor from the smaller quadrilateral to the larger?

• scale factor = 3

• scale factor = 4

• scale factor = 10

• scale factor = 2

Multiple Choice

What is the scale factor from the small shape to the big shape?

• 1/2

• 7/3

• 2/1

• 10/3

Multiple Choice

What is the scale factor from the small fry to the large fry?

• 1/3

• 48

• 4

• 3

Multiple Choice

What is the scale factor?

• 6

• 4

• 2.5

• 1.5

Multiple Choice

If a copy has a scale factor of 1/2 it is

• bigger

• smaller

• same size

Multiple Choice

If a copy has a scale factor of 6 then it is

• bigger

• smaller

• same size

Multiple Choice

What is the scale factor from ΔDEF to ΔABC?

• 1/2

• 7/3

• 2

• 10/3

Multiple Choice

What is the scale factor from ABCD to MNOP?

• 2/3

• 2

• 3/2

• 3

Hope this practice helps with your understanding of Monday's Lesson on Finding Scale Factor

Multiple Choice

What is the scale factor?

• 6

• 4

• 2.5

• 1.5