Exploring Line Reflections in the Coordinate Plane (Ver 2)

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• 離線版活動 (.zip)

• GeoGebra 檔

  1. Interact with the following app for a few minutes. Be sure to drag the LARGE POINTS, the dashed line, and Lisa's picture around! (.ggb)
     
  2. Here, the Mona Lisa is reflected about the xAxis. Drag points B, C, and the pre-image picture around and observe how her reflection changes. (.ggb)
     
  3. In the app above, move Lisa around to get different preimage points. Then, record their images in the image column. (.ggb)
     
  4. Now reposition the line so it coincides (lies on top of) the Y-AXIS. (.ggb)
     
  5. In the app above, move Lisa around to get different primage points. Then, record their images in the image column. (.ggb)
     
  6. Is it possible to move objects around so that Lisa's image lies perfectly on top of the her original (premiage)? Try it! (.ggb)
     
  7. Try again to see if it is possible to move Lisa's image on top of her preimage. Create a different setup from what you created above. (.ggb)