1.1 – Points, Lines, and Planes
Undefined Terms – terms only explained using examples and descriptions.
Collinear – points that lie on the same line.
Noncollinear – points that do not lie on the same line.
Coplanar – points that lie in the same plane.
Noncoplanar – points that do not lie in the same plane.
The Intersection of two or more geometric figures is the set of points they have in
common.
Definitions / Defined Terms – explained using undefined terms and / or other defined
terms.
Space – a boundless, three-dimensional set of all points.