4.4 Using Congruent Triangles CPCTC 2011
November 10, 2011
4.4 Using Congruent Triangles: CPCTC
Objective: Use triangle congruence and CPCTC to prove that parts of two triangles are congruent.
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4.4 Using Congruent Triangles CPCTC 2011
November 10, 2011
Warm­up:
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4.4 Using Congruent Triangles CPCTC 2011
November 10, 2011
Review: You can use three parts of triangles to show that triangles are congruent with SSS, SAS, ASA, and AAS.
Once you know triangles are congruent, you can make conclusions about the remaining parts because, by definition, corresponding parts of congruent triangles are congruent.
CPCTC
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4.4 Using Congruent Triangles CPCTC 2011
Statements
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Reasons
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4.4 Using Congruent Triangles CPCTC 2011
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Example:
Statements
Reasons
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4.4 Using Congruent Triangles CPCTC 2011
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Proof
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4.4 Using Congruent Triangles CPCTC 2011
slide
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slide
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4.4 Using Congruent Triangles CPCTC 2011
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About how wide was the river if the officer stepped off 20 paces and each pace was about 2 1/2 feet long?
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4.4 Using Congruent Triangles CPCTC 2011
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Homework: page 222
(1 ­ 8, 14, 26, 27)
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