Properties, Postulates, Definitions, and Theorems

A point that divides a segment into two congruent segments.

• Vertex

• Endpoint

• Angle bisector

• Midpoint

What is the reason for step #2?

• Definition of right angle

• Definition of supplementary angles

• Definition of perpendicular lines

• Definition of straight angle

What is the reason for step #2?

• Definition of linear pair

• Definition of supplementary angles

• Angle Addition Postulate

• Addition property

What is the reason for step #2?

• Definition of angle bisector

• Definition of congruent angles

• Definition of perpendicular angles

• Angle Addition Postulate

What is the reason for step #2?

• Definition of congruent segments

• Definition of congruent angles

• Definition of straight angle

• Definition of midpoint

What is the reason for step #2?

• Definition of angle bisector

• Definition of congruent angles

• Definition of right angle

• Definition of perpendicular lines

What is the reason for step #2?

• Substitution property

• Vertical Angle Theorem

• Definition of angle bisector

What is the reason for step #2?

• Definition of supplementary angles

• Definition of straight angle

• Angle Addition Postulate

• Addition property

What is the reason for step #1?

• Definition of straight angle

• Addition property

• Angle Addition Postulate

• Segment Addition Postulate

Which property, definition, or postulate justifies the statement?

• Angle Addition Postulate

• Definition of an Angle Bisector

• Definition of Congruence

• Complement Theorem