4.4 using congruent triangles cpctc · 2009. 11. 30. · 4.4 using congruent triangles cpctc 1...
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4.4 Using Congruent Triangles CPCTC
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4.1 4.3 Quick Review:1. Find a partner.2. Take out one piece of paper to share.3. Divide the paper into four even boxes.4. Draw and label an example for each scenario below.5. Trade with another group to check each others answers.
SSS SAS
ASA AAS
In each box, draw and label a pair of triangles that could be proven congruent by the given theorem.
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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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CPCTC
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.
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Statements Reasons
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Statements Reasons
Example:
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Proof
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slide slide
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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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Homework: page 222
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