Geometry 2.4 - 2.6

Terms	Definitions
addition property	If a=b, then a+c = b+c
subtraction property	If a=b, then a-c = b-c
multiplication property	If a=b, then ac = bc
division property	If a=b, and c is not 0, a/c = b/c
reflexive property	a = a
symmetric property	If a = b, then b = a
transitive property	If a = b and b = c, then a = c
substitution property	If a = b, then a can be substituted for b in any expression
theorem	A true statement that follows as a result of other true statements
right angle congruence theorm	All right angles are congruent.
congruent supplements theorem	If two angles are supplementary to the same or congruent angles, then they are congruent.
congruent complements theorem	If two angles are complementary to the same or congruent angles, then the two angles are congruent.
linear pair postulate	If two angles form a linear pair, then they are supplementary.
vertical angles theorem	Vertical angles are congruent.