4. Reflections
Constructing a Reflection
Use the written directions or the silent film to help you make your own construction.
Directions
1. Click on the Polygon tool to create any Polygon.
Hint: To close the Polygon, connect it to your first point.
2. Make a line anywhere using the line tool.
Hint: You need two points to make a line.
3. To perform a reflection:
5. Use the point tool to mark the places where our line of reflection & our segments meet.
Hint: Your points of intersection will be gray.
6. Use the Distance or Length tool to find the distance between the points on our pre-image to our corresponding point of intersection. Then find the distance between the points on our image to our corresponding point of intersection.
Hint: You should notice something interesting about the lengths of the segments formed by the pre-image & point of intersection and the segments formed by the image & point of intersection.
2. Make a line anywhere using the line tool.
Hint: You need two points to make a line.
3. To perform a reflection:
- Click on the "Reflect about Line" tool
- Click on the shaded region of your polygon
- Select your line.
5. Use the point tool to mark the places where our line of reflection & our segments meet.
Hint: Your points of intersection will be gray.
6. Use the Distance or Length tool to find the distance between the points on our pre-image to our corresponding point of intersection. Then find the distance between the points on our image to our corresponding point of intersection.
Hint: You should notice something interesting about the lengths of the segments formed by the pre-image & point of intersection and the segments formed by the image & point of intersection.
OR Video Walkthrough https://youtu.be/4iLCNvgArBQ
What do you notice about the construction?
I notice that...
What do you wonder about the construction?
I wonder...