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Lesson: 15 – 4 Preparing for Two-Column Proofs

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1 Lesson: 15 – 4 Preparing for Two-Column Proofs
Applied Geometry Lesson: 15 – 4 Preparing for Two-Column Proofs Objective: Learn to use properties of equality in algebraic and geometric proofs.

2 Two-Column Proof A deductive argument with statements on the left and reasons for those statements on the right.

3 Two column proof

4 Given Segment Addition Property Substitution Reflexive Substitution
- BC - BC Reflexive Substitution

5 Given Reflexive Addition Angle Addition Postulate Substitution

6 2. Definition of congruent angles.
1. Given 2. Definition of congruent angles. 3. Linear Pair 4. Substitution 5. Substitution 6. Subtraction 7. Definition of congruent angles.

7 Given Division Substitution Symmetric

8

9 Homework Pg – 16 E

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