Scaling Figures and Proportionality

The video tutorial covers lesson three on making scaled copies. It begins with an introduction to the learning goals, which include understanding operations to produce scaled copies and drawing them using a given scale factor. The first activity involves creating a scaled copy of a figure using a scale factor of three, while the second activity uses a scale factor of half. The tutorial also analyzes the work of two students, Diego and Jada, who use different operations to scale a polygon. The lesson concludes with a final activity and encourages students to ask questions during office hours if needed.

What is the primary goal when creating a scaled copy of a figure?

• To maintain the original size

• To add new sides to the figure

• To adjust the side lengths proportionally

• To change the shape of the figure

If a side of a figure is 4 units long, what will its length be in a scaled copy with a scale factor of 3?

• 16 units

• 4 units

• 7 units

• 12 units

When using a scale factor of 3, what operation is performed on the side lengths of the original figure?

• Multiplication

• Division

• Subtraction

• Addition

What is the result of applying a scale factor of 0.5 to a side that is 8 units long?

• 8 units

• 2 units

• 4 units

• 6 units

Which operation is used to create a scaled copy with a scale factor of 0.5?

• Multiplication

• Subtraction

• Division

• Addition

What operation did Diego use to scale the polygon?

• Addition

• Division

• Subtraction

• Multiplication

How did Jada achieve her scaled copy of the polygon?

• By multiplying each side by 3

• By dividing each side by 3

• By subtracting 10 from each side

• By adding 10 to each side

Why is Jada's method considered to produce a true scaled copy?

• Because it subtracts from each side

• Because it adds new sides

• Because it maintains proportionality

• Because it changes the shape

What must be true for a set of side lengths to be a scaled copy of a triangle?

• All sides must be equal

• All angles must be right angles

• The triangle must be isosceles

• The sides must be proportionally scaled

What should you do if you have questions about the lesson?

• Ignore them

• Search online for answers

• Ask a friend

• Write them down and ask during office hours