Dilations in Chapter 7!

While talking about ratios, proportions and scale factors. We need to talk about dilations.
Here is a video on dilations.



Having watched the video, there are ways to prove that two shapes are dilations of each other:

• corresponding sides have the same slope
• corresponding sides have a common scale factor
• corresponding sides have distances that are multiples of each other
• the objects of an area that is a multiple of the scalar factor squared

Concentrate on finding the slopes of lines. That's the easiest to figure out above all other tests.


Apply the bullet points from above to the video below. Only pay attention to 0 minutes to 7:20 minutes. The rest we didn't cover and will not cover in class. Prove that the triangles are dilations. I will count is as extra credit if you turn this in by Friday, March 7, 2014.