Unit 2 - Lesson 3 - Grade 8: Illustrative Mathematics

Dilate B using a scale factor of 5 and A as the center of dilation. Which point is its image?

Using H as the center of dilation, dilate G so that its image is E. What scale factor did you use?

Using H as the center of dilation, dilate E so that its image is G. What scale factor did you use?

To dilate F so that its image is B, what point on the diagram can you use as a center?

Dilate H using A as the center and a scale factor of 1/3. Which point is its image?

Describe a dilation that uses a labeled point as its center and that would take F to H.

Compare your drawing to other people’s drawings. What is the same and what isdifferent? How do the choices you made affect the final drawing? Was your dilated rectangle closer to C than to the original rectangle, or farther away? How is that decided?

What is the center of the dilation? Explain how you know.

Which triangle is the original and which triangle is the dilation? Explain how you know.