1. Word cloud

60 seconds

What is a dilation?

2. Slide

60 seconds

Dilation is a transformation that changes the size of an object. It involves stretching or shrinking an object along its axes. It can be represented by a scale factor.

What is Dilation?

3. Slide

60 seconds

Scale Factor: The ratio of two lengths and measures the amount of scaling that takes place. Axes: The plural form of axis, which is an imaginary line in a two dimensional figure that divides it into two equal halves. Transformation: A change in the position, size, or shape of a figure.

Concepts:

4. Poll

60 seconds

What do you think is the most important characteristic of a dilation?

- The shape of the dilation
- The scale factor
- The center of the dilation

5. Slide

60 seconds

Dilation can also refer to the process of increasing the size of something, such as a lake or ocean. The opposite of dilation is contraction. Dilation can also occur in time â€“ when time passes more slowly or quickly than usual.

Fun facts:

6. Drawings

450 seconds

Draw / write: What are the similarities between dilations and the other transformations (translations, rotations, and reflections)?

7. Drawings

360 seconds

Draw / write: What is the relationship between scale factor and the size of a dilation?

8. Open question

150 seconds

What strategies can be used to identify the center of a dilation?

9. Open question

330 seconds

How can you determine the scale factor of a dilation given the coordinates of the image points?

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