10-23-13. QCR Reasoning in Algebra & Geometry How are algebraic properties useful in geometry? Yesterday we talked about Properties of Equality. Today.

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Presentation transcript:

QCR

Reasoning in Algebra & Geometry How are algebraic properties useful in geometry? Yesterday we talked about Properties of Equality. Today we will add one more, the Distributive Property. We will also explore the Properties of Congruence.

Properties of Equality 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 a(c) = b(c) Division Property: If a=b, and c Ø = 0, then a/c = b/c Substitution Property: If a=b, then b can be substituted for a in any equation.

Properties of Equality, cont. Page 122

Properties of Congruence Page 122

Guided Practice Page 122 Got It #1 Page 123 Got It #2

Independent Practice Page #1-8

HomeworkPage 126 #14-17 Page 127 #27-32 Summary: Write a conditional statement. Then write its: converse, inverse, and contrapositive.