Put CW/HW on the corner of your desk!

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Presentation transcript:

Put CW/HW on the corner of your desk! Geometry Drill 9/30/10 #1.Write a two column proof Given: AB=CD Prove: AC=BD A C B D Put CW/HW on the corner of your desk!

Reason Statement Proof AB=CD BC=BC AB +BC = CD + BC AB +BC = AC CD + BC = BD AC = BD Given Reflexive property of Equality Addition Property of Equality Segment Addition Property of Equality Substitution Property of Equality

Geometry Objective STW start connecting information to proofs.

Geometry Theorems Overlapping Segments Theorem Overlapping Angle Theorem

Proofs Example 1 Given: Prove: B C A 2 1 3 D O

Proof Example 1 Statement Reason Given

Proof Example 1 Statement Reason Given

Proof Example 1 Statement Reason Given

Proof Example 1 Statement Reason Given Angle Addition Postulate

Proof Example 1 Statement Reason Given Angle Addition Postulate

Reason Statement Proof Example 1 Given Angle Addition Postulate Substitution Property of Equality

Reason Statement Proof Example 1 Given Angle Addition Postulate Substitution Property of Equality

Reason Statement Proof Example 1 Given Angle Addition Postulate Substitution Property of Equality Reflexive Property of Equality

Reason Statement Proof Example 1 Given Angle Addition Postulate Substitution Property of Equality Reflexive Property of Equality

Reason Statement Proof Example 1 Given Angle Addition Postulate Substitution Property of Equality Reflexive Property of Equality Subtraction Property of Equality