document.write( "Question 658589: Two colum proofs
\n" ); document.write( "Given: B is between A and D, C is between B and D
\n" ); document.write( "Prove: AD = AB+BC+CD
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Algebra.Com's Answer #410403 by MathLover1(20850)\"\" \"About 
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Segment \"ABCD\" - Given\r
\n" ); document.write( "\n" ); document.write( "\"AB+%2B+BC+=+AC+\"- Segment Addition\r
\n" ); document.write( "\n" ); document.write( "\"AC+%2B+CD+=+AD\" - Segment Addition\r
\n" ); document.write( "\n" ); document.write( "\"AB+%2B+BC+%2B+CD+=+AD\" - Substituion
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