# Dilation Practice

- Author:
- Laura Travis

Instructions
Please see the attached video for instructions on this assignment. (it's the same video that is on Google Classroom)
IT IS RECOMMENDED THAT YOU USE A COMPUTER OR TABLET FOR THIS ASSIGNMENT. While it is possible to do this assignment on your phone, there are parts of the assignment that may not display well on a phone. Your work may not be saved if done on your phone (you can save it using pictures, details below)
MAKE SURE YOU ARE USING GOOGLE CHROME AS YOUR WEB BROWSER or your work will NOT be saved. You can choose to instead take screenshots or photos of your work and upload those to Google Classroom instead.
Make sure you read through the instructions carefully and that you complete the 10 graphs and the 2 scale factor questions.
CHROME USERS ONLY:
~ Check at the bottom of this screen and make sure you see the avatar for your school Google account. You can click on the avatar picture to switch accounts.
~ If you need to leave your work and come back, make sure that it says "All Changes Saved" in the top right corner of this screen and that Geogebra has created an attachment on the Google Classroom assignment before you close the window/tab.
~When you are ready to continue working, click on the Geogebra attachment on the Google Classroom assignment to open up your saved work.
~When you are ready to turn in, either wait until it says "All Changes Saved" in the top right corner on this screen or click the blue "Turn In" button at the bottom of the page. It may take a minute to submit. If the blue Turn In button is not working, but it says "All Changes Saved" in the top right corner and there is a Geogebra attachment on the Google Classroom assignment, you can just close this tab and manually turn in the assignment on Google Classroom.
IMPORTANT: If Geogebra does not automatically create an attachment on your Google Classroom assignment, then you will need to take pictures or screenshots of your work instead:
~Make sure the photos are upright before uploading them to Google Classroom
~There are 10 graphs that you need to complete and 2 questions that you need to answer. Make sure that you upload photos for all 12 questions.
~If you are not sure how to take a screenshot on your device, look up how using Google (how to take a screenshot on a _______) or leave a private comment on the Google Classroom assignment with the type of device you are using: phone (list the specific model), iPad/tablet (list the specific model), Chromebook, Windows laptop/desktop, or Mac/Apple laptop/desktop and I will help you figure it out.

## Video Instructions and Examples

Graph the Dilation
In the following graphs, you will be given a red pre-image and a scale factor. Figure out what the dilated image will look like and the use the Polygon tool to graph the dilation.
DO NOT MOVE THE RED PRE-IMAGE OR YOU WILL ONLY GET HALF CREDIT FOR THAT PROBLEM. If you accidentally move the red pre-image, you can reset the graph using the circular arrows in the top right corner of the graph.
All dilations will be centered at the origin at (0,0)

## 1. Graph a dilation of the given figure from the origin with a scale factor of 2

## 2. Graph a dilation of the given figure from the origin with a scale factor of 4

## 3. Graph a dilation of the given figure from the origin with a scale factor of 1.5 or 3/2

## 4. Graph a dilation of the given figure from the origin with a scale factor of 0.5 or 1/2

## 5. Graph a dilation of the given figure from the origin with a scale factor of 0.5 or 1/2

## 6. Graph a dilation of the given figure from the origin with a scale factor of 2

## 7. Graph a dilation of the given figure from the origin with a scale factor of 2

## 8. Dilate the given figure from the origin with a scale factor of 2.5 or 5/2

## 9. Graph a dilation of the given figure from the origin with a scale factor of 0.25 or 1/4

## 10. Graph a dilation of the given figure from the origin with a scale factor of 1.5 or 3/2

Find the Scale Factor
In this section, look at the given graph and find the scale factor required to go from the red pre-image to the blue image. The scale factor may be written as a decimal or a fraction. Some scale factors will be whole numbers.
DO NOT MOVE ANY POINTS ON THE GRAPHS BELOW OR YOU WILL ONLY GET HALF CREDIT FOR THAT PROBLEM. If you accidentally move something, you can reset the graph using the circular arrows in the top right corner of the graph.
All dilations are centered at the origin at (0,0)

## Graph 11

What is the scale factor to go from the red triangle ABC to the blue triangle A'B'C' for graph 11 if the center of dilation is at the origin?

## Graph 12

What is the scale factor to go from the red triangle ABC to the blue triangle A'B'C' for graph 12 if the center of dilation is at the origin?