point
is undefined, has no size and is defined by a capital letter
space
the set of all points
line
can be considered a series of points that extend in two opposite directions. has no end
collinear points
points that lie on the same line
plane
contains many lines and extends without end in the directions of its line. its a flat surface with no thickness
coplanar
are figures that line in the same plane
postulate
also called an axiom is an accepted statement or fact. through any two points there is exactly one line
axiom
or postulate is an accepted statement or fact. through any two points there is exactly one line
segment
the part of a line consisting of two points called end points, and all points between them
ray
is the part of a line consisting of one endpoint and all the points of the line on one side of the endpoint
opposite rays
two collinear rays with the same endpoint. they form a line
parallel lines
two lines are parallel if they lie in the same plane but do not intersect..
skew lines
lines that do not lie in the same plane. they are not parallel and do not intersect
parallel planes
planes that do not intersect