acute angle
An angle that measures greater than 0° and
less than 90°
intersecting lines
Lines that cross each other at exactly
one point
line
A straight path of points in a plane that
continues without end in both directions
with no endpoints
A part of a line that includes two points
called endpoints and all the points
between them
obtuse angle
An angle that measures greater than 90º and
less than 180º
point
An exact location in space
right angle
An angle that forms a square corner
straight angle
An angle whose measure is 180°
