How to determine the scale factor for the dilation of two triangles

The video tutorial explains the concept of proportionality in geometry, focusing on determining if two figures are proportional by comparing the ratios of their sides. It discusses how to calculate the scale factor needed to transform one figure into another, emphasizing that for enlargements, the scale factor must be greater than one. The tutorial provides examples to illustrate these concepts, helping learners understand how to apply them in geometric problems.

What is the primary goal when determining if two figures are proportional?

• To calculate the perimeter of the figures

• To find the area of the figures

• To check if the figures have equivalent side ratios

• To determine the color of the figures

How do you determine the scale factor between two proportional figures?

• By adding the lengths of all sides

• By dividing the length of one side by the corresponding side of the other figure

• By subtracting the lengths of the sides

• By multiplying the lengths of the sides

What must be true about the scale factor when enlarging a figure?

• It must be less than one

• It must be equal to one

• It must be greater than one

• It can be any positive number

When applying a scale factor, what operation is performed on the side lengths?

• Addition

• Division

• Subtraction

• Multiplication

What is the result of applying a scale factor greater than one to a figure?

• The figure becomes smaller

• The figure remains the same size

• The figure changes shape

• The figure becomes larger