3 parts can prove ?s are ?. . SSSSASASAAAS. . . Now lets make conclusions about their other parts.. CPCTC ? Corresponding Parts of ? ?s are ?. Proof:. Given: SL ? SR ?1 ? ?2Prove: ?3 ? ?4. . . . . . C. S. L. R. 1. 2. 3. 4. Statements1) SL ? SR2) ?1 ? ?23) CS ? CS4) ?SLC ? ?SRC5) ?3 ? ?4.
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1. Sec. 4-4 Using ? ? and CPCTC Objective:
1) To use ? congruence and CPCTC to prove that parts of 2?s are congruent.
3. Proof: Given: SL ? SR
?1 ? ?2
Prove: ?3 ? ?4
4. Proof: Given: ?DEG is Right
?DEF is Right
?EDG ? ?EDF
Prove: FE ? EG
5. What have you learned?? What does CPCTC stand for?
Corresponding parts of congruent triangles are congruent.
What must you prove before you use CPCTC?