a portion of a line which starts at a point and goes off in a particular direction
ray
a line that has two endpoints
line segment
a dot that indicates location
point
a flat surface two dimensional surface
plane
has no curves no thickness and extends in both direcrions
line
a angle that measures at exactly 90 degrees
right angle
a angle that measures 45 degrees
Acute
a angle that measures at 120 degrees
obtuse
a property of measurement related to the unit of measure use
precision
the length of how far two points are from each other
distance
the middle of the line segment
midpoint
two angles that when added together gives you 180 degrees
supplementary angle
two angles that when added together you 90 degrees
complementary angle
a pair of non adjacent angles formed when two lines intersect
vertical
two angles that have a common side and vertex
adjacent
a pair of adjacent supplementary angles
linear pair
the same or similar
congruent
being cut into two equal parts
bisector
points that lie on the same plane
coplanar
points that lie on the same line
colinear
boundless three dimensional that contains lines and planes
space
difference between actual measure and allowable measure
absolute error
the ratio of absolute error to the actual measure
relative error
a circle broke into 360 parts
degree
the rays or faces of an angle
sides