Basic Definitions
These are two angles that share a side.
What is adjacent angles?
This is a point, line, ray, or other segment that cuts a segment in two congruent segments.
What is a segment bisector?
These are two angles that make and X and are across from each other.
What are vertical angles?
This is formed by two rays with the same endpoint.
What is an angle?
These are two angles whose measures have a sum of 90 degrees.
What are complementary angles?
This is part of a line that consists of one endpoint and continues on in one direction.
What is a ray?
The point where an angles sides meet.
What is the vertex?
These are a pair of adjacent angles that form a straight line.
What are a linear pair?