1. 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!

2. 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

3. Geometry Objective
STW start connecting information to proofs.

4. Geometry Theorems
Overlapping Segments Theorem
Overlapping Angle Theorem

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

6. Proof Example 1
Statement
Reason
Given

7. Proof Example 1
Statement
Reason
Given

8. Proof Example 1
Statement
Reason
Given

9. Proof Example 1
Statement
Reason
Given
Angle Addition Postulate

10. Proof Example 1
Statement
Reason
Given
Angle Addition Postulate

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

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

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

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

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