Angles
Angle Pairs
Basic Definitions
Segments
Undefined Terms
100
Angles that have the same measure
What are congruent angles?
100
Two angles whose measures have a sum of 90 degrees.
What are complementary angles?
100
A point at an end of a segment or the starting point of a ray
What is an Endpoint?
100
Part of a line that is bounded by two end points and contains every point onthe line between its endpoints.
What is a segment?
100
An undefined term in Geometry. It names a location and has no size.
What is a point?
200
The common endpoint of the sides of the angle.
What is a vertex?
200
Two angles in the same plane with a common vertex and a common side, but no common interior points
What are Adjacent Angles?
200
The point that divides a segment into two congruent segments.
What is a Midpoint?
200

Two rays that have a common endpoint and form a line

What are opposite rays?

200
An undefined term in geometry that is a straight path that has no thickness and extends forever.
What is a line?
300
A figure formed by two rays with a common endoint
What is an angle?
300
A pair of adjacent angles whose common sides are opposite rays
What is a Linear Pair?
300
Points that lie on the same line.
What is a Collinear?
300
A line, ray, or segment that divides a segment into two congruent segments.
What is a segment bisector?
300
An undefined term in Geometry, it is a flat surface that has no thickness and extends forever.
What is a plane?
400
A ray that divides an angle into two congruent angles.
What is an angle bisector?
400
Two angles whose measures have a sum of 180 degrees.
What are supplementary angles?
400

You need 3 noncollinear points to name me. 

What is a plane?

400
Two segments that have the same length.
What are congruent segments?
400
A part of a line that starts at an endopint and extends forever in one direction.
What is a ray?
500

If point D is the interior of <ABC then,                 <ABD + <DBC = <ABC

What is the angle addition postulate?

500

Opposite and congruent angles formed by two intersecting lines.

What are vertical angles?

500

To divide into two congruent parts.

What is bisect?

500

If point b is between segment AC then AB+ BC= AC. 

What is segment addition postulate?

500
A statement that is accepted as true without proof. Also called an axiom.
What is a postulate?
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