Geometry Properties

If angle 1 - angle 5= angle 2 - angle 5, then angle 1 = angle 2

Addition Property of Equality

If angle 6 + angle 4= angle 7 + angle 4, then angle 6= angle 7

Subtraction Property

If AB÷ ED = AC÷ ED, then AB=AC

Multiplication Property

If ST=TH, the S = H

Division Property

If 2(AB+BC), then 2AB+ 2BC

Distributive Property

For every number a, a=a

Reflexive Property

If angle 1 + angle 2 = 180 and angle 3 + angle 4 = 180, then angle 1 + angle 2= angle 3 + angle 4

Substitution Property

If AB=QR and QR=XY, then AB=XY

Transitive Property

IF ab=bc then line segment AB is congruent to line segment BC

Definition of congruence

If two lines are perpendicular, then four right angles are formed

Definition of Perpendicular