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OpenStudy (anonymous):
Suppose triangle ABC is isosceles, where side AB is equal to side CB. Prove that angle BAC is congruent to angle BCA.
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OpenStudy (mathstudent55):
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OpenStudy (mathstudent55):
One way of doing it is to think of triangles ABC and CBA as two different triangles. Prove them congruent by SAS. Then by CPCTC you can prove the angles congruent.
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