a flat surface that extends forever
a definite location in space
a straight set of points that go on forever in both directions. (infinitely)
part of a line with two definite endpoints
a straight set of points with one definite endpoint and going on infinitely in one direction.
a point which divides a line segment into two congruent segments
having equal measure
segments with the same measurements
line, segment or ray that cuts a line segment through its' midpoint into two congruent segments.
lines that intersect to form right angles
lines in the same plane that never intersect
lines that cross
lines that are not parallel or intersecting
line that crosses two or more parallel lines