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# prop of cong. and eq

### Properties of congruence and equality

If a = b, then a+b=b+c Addition property of Equality
If a = b, then a-c=b-c Subtraction property of Equality
If a = b, then ac = bc Multiplication Property of Equality
If a = b, then a/c = b/c provided c not 0 Division Property of Equality
a = a Reflexive property of Equality
If a = b and b = c, then a = c Transitive Property of Equality
If a = b, then b = a Symmetric Property of Equality
If a = b and x+a = c, then x+b = c Substitution Property of Equality
Angle A is congruent to Angle A Reflexive property of Congruence
If angle A is congruent to angle B and angle B is congruent to angle C, then angle A is congruent to angle C Transitive Property of Congruence
If angle A is congruent to angle B then angle B is congruent to angle A Symmetric Property of Congruence
Created by: jbenecke