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A.given
B. Definition of congruence
C.CPCTC
D.substitution property of congruence

A.given B. Definition of congruence C.CPCTC D.substitution property of congruence-example-1
User Bgoldst
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CPCTC means congruent parts of congruent triangles are congruent.


1. Because ΔABC =ΔAED, their corresponding sides and angles are congruent.

2. So, ∠BAC =∠EAD.

So, reason for 2. ∠BAC =∠EAD is C.CPCTC.

User Steffen Moritz
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