Understanding Dilations with Negative Scale Factors

This video tutorial covers the concept of dilations in geometry, focusing on how negative scale factors affect the transformation. It begins with an introduction to dilations and scale factors, explaining how different values impact the size and position of shapes. The tutorial then explores the concept of negative scale factors, demonstrating with examples how they result in shapes being flipped and resized. The video includes practical examples using scale factors of -1 and -1/2, both from the center and non-center points, to illustrate these transformations.

What happens to a point when the scale factor is 2?

• The point triples its distance from the center.

• The point doubles its distance from the center.

• The point remains stationary.

• The point moves to half its original distance.

What happens to a point with a scale factor of 1?

• The point moves to the opposite side.

• The point is reduced to half its size.

• The point remains in its original position.

• The point doubles its distance.

How does a scale factor of 1/2 affect a point's position?

• The point flips to the opposite side.

• The point moves twice as far.

• The point remains stationary.

• The point moves half as far from the center.

How does a negative scale factor affect the direction of dilation?

• It doubles the distance from the center.

• It keeps the point in the same position.

• It flips the point to the opposite side of the center.

• It moves the point closer to the center.

In a dilation with a negative scale factor, what is the relationship between the original and new positions?

• They are on the same side of the center.

• They are equidistant from the center but on opposite sides.

• They are at the same point.

• They are twice as far apart.

What is the result of a dilation with a scale factor of -1?

• The shape is flipped and remains the same size.

• The shape is reduced to half its size.

• The shape becomes twice as large.

• The shape disappears.

In a grid example, what does a scale factor of -1/2 do to the shape?

• It enlarges the shape.

• It moves the shape to the original position.

• It keeps the shape the same size.

• It reduces the shape to half its size and flips it.

What is the effect of a negative scale factor on the size of a shape?

• The shape becomes larger.

• The shape remains the same size.

• The shape disappears.

• The shape is flipped and reduced in size.

When dilating from a non-central point with a negative scale factor, what is the first step?

• Measure the distance to the point.

• Ignore the original position.

• Move the point to the center.

• Double the distance to the point.

What is the result of using a negative scale factor from a non-central point?

• The shape is moved to the center.

• The shape is enlarged.

• The shape remains unchanged.

• The shape is flipped and reduced in size.