Exploring Points, Lines, and Planes (V2)
In this app, construct a point and a line. If you experience difficulty using these tools, refer to the quick silent screencast at the bottom of this page.
In the app above, select the MOVE 
tool. Move the 3 points you see around.
Without Googling, how would you describe the term "POINT" in your own words?
Without Googling, how would you describe the term "LINE" in your own words?
In the app below,
What do you notice? What do you wonder? 
to construct a plane. To do so, select this tool and plot 3 points anywhere you'd like. when finished so you can move this plane around.
Without Googling, how would you describe the term "PLANE" in your own words?