1. Warm up Are they congruent, if so, tell how. 1. 2. AAS Not congruent3.
Not congruent

2. 2-Column Proofs
Going by the facts: definitions, properties, postulates, and theorems
Numbering the statements and reasons
Using logical order
Statements
Reasons 1. 2. 3. . 1. 2. 3. .

3. Given: seg WX  seg. XY, seg VX  seg ZX, Prove: Δ VXW  Δ ZXY1 2 Y V

4. Proof Statements Reasons 1. seg WX  seg. XY 1. given seg. VX  seg ZX
2. 1  
3. Δ VXW  Δ ZXY

5. Given: seg RS  seg RQ and seg ST  seg QT Prove: Δ QRT  Δ SRT.

6. Proof Statements Reasons Seg RS  seg RQ 1. Given seg ST  seg QT
2. Seg RT  seg RT 2.
3. Δ QRT  Δ SRT 3.

7. Example Given that B  C, D  F, M is the midpoint of seg DF
Prove Δ BDM  Δ CFM B C ) ) (( )) D M F