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GeoGebraGeoGebra Classroom

1.1 Points, Lines, and Planes

Undefined Terms. In geometry, point, line, and plane are considered undefined terms because they are only explained using examples and descriptions.

1. A point is a location. Draw point A below

2. Draw a line through points A and B below

3. Draw a plane through points A,B,C, and D

4. Draw a collinear points using points X,Y,Z.

5. Draw a coplanar points using points P,Q,R