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Name ______________________________________________-___________ Notes 4-3 p. 1 Date _____________ 4-3 Corresponding Parts of Congruent Triangles Triangles that have the ________ _______ and ________ _________ are ______________ triangles. Two triangles are____________ if and only if _____ _________ _________ of corresponding ________ are ____________ and ____ ________ _________ of corresponding ________ are ____________. _____________________ The _________ that are must be written in the _______ ___ _____________ in a triangle congruence statement. Angles are Sides are : : A R, , B S, C T , CPCTC: _______________ _________ of ______________ ______________ are _______________. Identify Congruence Transformations: If two triangles are ____________, you can _______, ______, or ______ one of the triangles and they will still be ___________. These are called ______________ ___________ because they do not change the ______ or _______ of the figure. It is common to use prime symbols to distinguish between an original DEF and a transformed D'E'F'. 4-3 Notes p. 2 Identify the congruent triangles in each figure and name the corresponding congruent parts. 4-3 Notes p. 3 Corresponding Parts of Congruent Triangles Triangles that have the same size and same shape are congruent triangles. Two triangles are congruent if and only if all three pairs of corresponding angles are congruent and all three pairs of corresponding sides are congruent. ABC RST The angles that are must be written in the order of congruence in a triangle congruence statement. Angles are Sides are : : A R, , B S, C T , CPCTC: corresponding parts of congruent triangles are congruent. 4-3 Notes p. 4 Identify Congruence Transformations: If two triangles are congruent, you can slide, flip, or turn one of the triangles and they will still be congruent. These are called congruence transformations because they do not change the size or shape of the figure. It is common to use prime symbols to distinguish between an original DEF and a transformed D'E'F'. 4-3 Notes p. 5 Identify the congruent triangles in each figure and name the corresponding congruent parts.