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OpenStudy (anonymous):
Please help! Will give medal! Triangle ABC is congruent to triangle DEF. In triangle ABC, side AB measures 13, side BC measures x+13 and side CA measures 16. In triangle DEF, side DE measures 13, side EF measures 3x-20 and side FD measures 16. What equation would help you to solve for the side length of BC and EF? Explain your reasoning using complete sentences. I was thinking it could be 3 squared ( 30 - 20 ) = BC and EF
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