Indicates a location represented by a dot
Point
Represented by a stright line
Line
Flat surface that extends withoout end
plane
Points on the same line
Co-linear points
Points not on the sme line
Non Co-linear points
The set of points that two geometric figures have in common
Intersection
Part of a line with two endpoints and all points inbetween them
Segment
Two segemets with the same length
Congruent
A point that divides a segment in half
Midpoint
A point,line,ray, or othther segment that intersects a segment at its mid point
Segemnt bisector
Part of a line with one end point and all points of the line on one side of the endpoin t
Ray
Coplanar lines that never intersect
Paralell
lines that meet to form right angles
Perpendicular
noncoplanar lines that never intersect
skew
Endpoint of the rays that form an angle
Vertex
Angles that have the same measure
congruent
Angles that share a common side,common vertex,and no common interior point
Two angles with the same vertex whose sides are oppisite rays
vertical
An angle less then 90
Acute
An angle more than 90 and less then 180
Obtuse
A 90 degree angle
Right
A 180 dgree angle
Straight
two angles that add up to 90 degrees
Complementary
A pair of angles that add up to 180
supplementary