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2.6 Properties of Equality and Congruence Textbook page 88 Reflexive Property Equality AB AB mA mA Congruence AB AB A A Symmetric Property Equality: If AB CD, then CD AB If mA mB, then mB mA Congruence: If AB CD, then CD AB If A B, then B A Transitive Property Equality: If AB CD & CD EF , then AB EF If mA mB & mB mC , then mA mC Congruence: If AB CD & CD EF , then AB EF If A B & B C , then A C Properties of Equality Addition Property: adding a number to each side of an equation Subtraction Property: subtracting a number from each side of an equation Multiplication Property: multiplying by a number on each side of an equation Division Property: dividing by a number on each side of an equation Substitution Property: substituting a number for a variable in an equation to produce an equivalent equation Homework Assignment # 3 Textbook Page 91 Problems 1-9 all (we will do these together in class) Problems 10-20 all, 31-43 odd (do these on your own) You will not have to write the problems IF you have been good so far AND continue until you are dismissed