A precise location or place on a line or plane
Point
An object that is straight, infinitely long and infinitely thin.
Line
A flat surface that is infinitely large
Plane
A portion of a line which starts at a point and goes off in a particular direction to infinity
Ray
A portion of a line
Line Segment
Never touching
Parallel
Lines that are not coplanar
Skew
Two angles in corresponding positions relative to two lines
Corresponding
Lines that cross
Interesting
Points all in one plane
Coplanar
Points all on one line
Collinear
Not all on the same line
Non- Collinear
Not all on the same plane
non-coplanar
A line meeting at a right angle
Perpendicular
A figure formed by two rays that have the same endpoint
angle
Equal measures
Congruent
Divides the angle into two congruent angles
Bisector
Less than 90 degrees
Acute
Larger than 90 degrees, less than 180
Obtuse
90 degrees
Right
Two angles whose sides form two pairs of opposite rays
Vertical
Two angles in a plane that have a common vertex and side, but no common interior points
Adjacent
Two angles whose measures have the sum of 90
Complementary
Two angles whose measures have the sum of 180
Supplementary