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Mathematics, 11.03.2020 23:26 nyce36

Harrison began a proof.
CE=DF because segment CE segment DF.
CD + DE=CE and DE+EF=DF by the segment addition postulate.
DE + EF = CE by substituting CE for DF.
What is a possible next step in Harrison's proof?

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You know the right answer?
Harrison began a proof.
CE=DF because segment CE segment DF.
CD + DE=CE and DE+EF=DF by...
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