Transforming a picture
Task
Resize an inserted picture to a certain size and apply transformations to the picture in GeoGebra.
Explore the construction...
Instructions
Learn how to recreate the figure above.
| 1. | Make sure that you have the picture of the sunset saved on your computer before you start the actual construction. | |
| 2. |  | Insert the picture of the sunset in the left part of the  Graphics View using the Image tool.
Note: The first corner point A and the second corner point B of the image are created automatically. |
| 3. | 
| Move point A at the lower left corner of the picture and observe, how this affects the picture. |
| 4. | 
| Delete point B using the Delete tool. |
| 5. |  | Create a new point B by entering B = A + (3, 0) into the Input Bar.
Hint: Don't forget to press Enter after your input.
|
| 6. |  | Set the new point B as the SECOND corner point of the picture to change its width to 3 cm. Hint: Open the Settings of the image and select tab Position. |
| 7. |  | Create a vertical line through two points in the middle of the Graphics View using the Line tool. |
| 8. |  | Mirror the picture at the line using the Reflect about Line tool by selecting the image and then the line. |
| 9. |
| You might want to reduce the opacity of the image to be able to better distinguish it from the original (Settings of the image, tab Color). |
Try it yourself...
Instructions (continued)
| 10. | 
| Delete point B to restore the picture’s original size using the Delete tool. |
| 11. | 
| Create a new point B close to the lower right corner of the original picture. |
| 12. |
| Set the new point B as the SECOND corner point of your picture. Hint: Open the Settings of the image and select tab Position. Note: You can now resize the image by moving point B. |
| 13. |
| Create a new point E at the top left corner of the original picture. |
| 14. |
| Set the new point E as the FOURTH corner point of your picture. Hint: Open the Settings of the image and select tab Position. |