4.1 - Congruent Triangles

​To recognize congruent triangles and their corresponding parts.

​Congruent Triangles:

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​Triangles with the same size and shape are congruent.

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​This means that all the corresponding parts (sides and angles) are congruent.

("Corresponding parts"? Put your fingertips together. Your corresponding fingers are touching. Thumb to thumb, ring finger to ring finger, so forth)

​This works in the opposite direction as well. If we know two triangles are congruent, that means that all their pairs of corresponding parts are congruent. We use the abbreviation CPCTC:

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​Corresponding Parts of Congruent Triangles are Congruent

​Take the next 10 minutes to complete #3, 4, and 5 on your fillable notes.