Math - Angles
Perpendicular
lines, line segments or rays that intersect to form 90 degree angles
Intersecting
2 or more lines, rays or line segments that cross or touch
Parallel
2 or more lines, rays or line segments that never intersect
Line
A collection of points in the same plane that extend continuously in both directions
Ray
A line that extends continuously in only one direction; the other end is an endpoint
Line segment
A piece of line; it has 2 end points
vertex
A point where two or more straight lines, rays or line segments meet.
obtuse angle
An angle that is >90 degrees and <180 degrees.
acute angle
An angle that measures >0 degrees and <90 degrees
straight angle
An angle that measures exactly 180 degrees.
right angle
An angle that measures exactly 90 degrees.
reflex angle
Angles whose measure is >180 degrees and <360 degrees