Analyzing relationships between points lines and planes given a figure

Important terms:

• collinear - on the same line

• coplanar - on the same plane

Important ideas:

• any two points are collinear--there's always a line you can draw between them

• any three points are coplanar

• a line and a point are always coplanar

How to name a plane:

1. with three points that are all on the plane, but not all on the same line, for example: plane BEF

2. with a single letter someone wrote in the corner of the plane, for example: plane X