DISCOVER PARALLEL
Instructions
Step 1. Construct
One the GeoGebra page you will see four geometric objects:
1. Point A
2. Point B
3. Point C
4. Line BC
On the Tool Bar there is a PARALLEL LINE
tool.Click on the PARALLEL LINE tool to select it.
Notice the instructions for this GeoGebra tool: SELECT POINT AND PARALLEL LINE.
Click first on Point A and then click on Line BC. This will create a new, parallel line. But just what is a parallel line?
Step 2. Experiment
Use the MOVE tool
to experiment by moving Points A, B, or C. Move the two lines as well. Make observations. If needed, use the ZOOM IN
or ZOOM OUT
tools to change your view.
Step 3. New Construction
Use the DELETE OBJECT
tool to click on the points and lines on the GeoGebra page and delete them. Now use the NEW POINT
tool, the LINE THROUGH TWO POINTS
tool, and the PARALLEL LINE
tool to create your own parallel lines and again experiment by moving points or lines.
Step 4. Conclusions
So just what is a parallel line? Share your conclusions with your teacher.
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