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CPCTC http://www.lz95.org/lzhs/Math/knerroth/geometry/Geometry%20Chap%203%20PDF/3.3-CPCTC.ppt#256,1,CPCTC.

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Presentation on theme: "CPCTC http://www.lz95.org/lzhs/Math/knerroth/geometry/Geometry%20Chap%203%20PDF/3.3-CPCTC.ppt#256,1,CPCTC."— Presentation transcript:

1 CPCTC

2 Match the Corresponding Parts
B C AB BC AC DF DE D EF E F

3 C.P.C.T.C. Corresponding Parts (of) Congruent Triangles (are) If two triangles are congruent, then their corresponding parts are also congruent.

4 Very important!!!! Before you use CPCTC you must prove or know that the two triangles congruent!!!

5 Using CPCTC

6 With your partner write down all congruent parts.

7 Find the value of all the angles
ΔJKL  ΔMKL J = 3x + 2 JLK = 90° M = 5x - 32 J = JKL = JLK = MLK = MKL = M = 53 37 90

8 CPCTC in a Proof: Given: TI  SN TN  SI Prove:  T   S T S E I N

9 CPCTC in Proofs: A J M R I Given: JM  RM AM  MI Prove: AJ  RI

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