Definitions, Theorems, Properties, & Postulates
Correct Segment Notation
Correct Angle Notation
We can say segments are congruent.
We can say angles are congruent.
We say lengths of segments are equal.
We say measures of angles are equal.
*Remember Definitions work both ways. They are biconditional statements!
Name of Definition
What it tells you…
Definition of Congruence
If two things are equal then they are congruent.
Definition of a Midpoint
The point that divides a segment into two congruent segments.
Definition of a
Segment Bisector
A point, ray, line, line segment, or plane that intersects the
segment at its midpoint.
Definition of an Angle
Bisector
A ray that divides an angle into two congruent angles.
Definition of
Complementary Angles
Two angles whose sum is 90 .
