Finding Scale Factor: Big to Small and Small to Big

The video tutorial explains how to find the scale factor between two similar figures. It begins with a review of the scale factor concept, followed by three examples demonstrating how to calculate the scale factor from small to big and big to small. The tutorial emphasizes identifying corresponding sides and using the reciprocal relationship between scale factors. The video concludes with an invitation for students to reach out for further assistance.

What is a scale factor in the context of similar figures?

• A technique to find the angle measurements in polygons

• A method to determine the area of a figure

• A number used to multiply side lengths to create a similar figure

• A formula to calculate the perimeter of a figure

Tags

CCSS.7.G.A.1

How do you find a scale factor between two corresponding sides?

• Add the lengths of both sides

• Divide the length of one side by the other

• Multiply the lengths of both sides

• Subtract the length of one side from the other

Tags

CCSS.7.G.A.1

What is the scale factor from a smaller figure to a larger figure if the sides are 4 and 8 respectively?

• 4

• 8

• 2

• 0.5

Tags

CCSS.7.G.A.1

What is the reciprocal of a scale factor of 2?

• 1

• 0.5

• 4

• 2

Tags

CCSS.8.G.A.3

If the scale factor from a larger to a smaller figure is 1/2, what is it from smaller to larger?

• 1/4

• 4

• 2

• 1/2

Tags

CCSS.7.G.A.1

How can you simplify the scale factor ratio 9/6?

• 1/2

• 3/2

• 6/9

• 2/3

What is the scale factor when going from a figure with side 33 to a side 11?

• 1/3

• 3

• 33/11

• 11/33

Tags

CCSS.7.G.A.1

If a side of a smaller figure is 6 and the corresponding side of the larger figure is 9, what is the scale factor?

• 2/3

• 3/2

• 1/1.5

• 1.5

Tags

CCSS.7.G.A.1

What is the reciprocal of a scale factor of 1/3?

• 0.33

• 1

• 3

• 1/3

Tags

CCSS.8.G.A.3

For additional help on scale factors, where can students reach out?

• Check the textbook

• Post on Schoology

• Search online

• Email the teacher

Tags

CCSS.7.G.A.1