Sec. 2-4 Reasoning in Algebra

Jun 25, 2012

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Review properties of equality and use them to write algebraic proofs.Identify properties of equality and congruence. . Objectives. In Geometry you accept postulates

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Sec. 2-4 Reasoning in Algebra

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1. Sec. 2-4 Reasoning in Algebra Objective: To connect reasoning in Algebra & Geometry

2-4 Reasoning in Algebra

2-4 Reasoning in Algebra. Objectives: Use basic properties of algebra in reasoning Define congruence State the properties of congruence. Properties of Equality. Solve and Write a Justification for Each Step. 2 (x + 1) = 8 Given 2x + 2 = 8 Distributive Property

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Algebra 2 Lesson 2-4

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2-4: Using Proof in Algebra

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Section 2-4: Reasoning in Algebra

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2-5 Reasoning in Algebra

Do Now: 1. Copy down HW. 2. Take out HW. 3. When two planes intersect, what does their intersection form? 4. How many points does it take to create a plane?. 2-5 Reasoning in Algebra. (7 cards). Addition/Subtraction Property. Add or subtract the same number from both sides of an equation

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2-4 Reasoning in Algebra

2-4 Reasoning in Algebra. Ex. 1 Justifying Steps. 1 . angle addition post. 2. substitution 3. simplify 4 . subtraction prop of = 5. division prop of =. Solve for x and justify 1. m<AOB + m<BOC = m<AOC 2. x + 2x + 10 = 139 3. 3x + 10 = 139 4. 3x = 129 5. x = 43. Ex. 1 Cont.

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2.4 Reasoning in Algebra Part 3

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2.4 Reasoning in Algebra

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Section 2.4: Reasoning in Algebra

Section 2.4: Reasoning in Algebra. Objective: To connect reasoning in algebra and geometry. Reasoning in algebra. In Geometry, we accept postulates and properties as true. We use properties of equality to solve problems.

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