an undefined term with no length, heighth, or width; simply a location
an undefined term with infinite length, but no width or height.
an undefined term with infinite length and width but no height; a flat surface made up of points.
Points that lie on the same line
Points that lie in the same plane.
a boundless, three dimensional set of all points.It can contain lines and planes
a portion of a line with definite endpoints
same shape and size.