document.write( "Question 777978: Complete the proof. \r
\n" ); document.write( "\n" ); document.write( "Given: ∠DCE≅∠CDE≅∠DEC; ∠CDB≅∠CBD\r
\n" ); document.write( "\n" ); document.write( "Prove: BC≅DE\r
\n" ); document.write( "\n" ); document.write( "a. DE≅EC≅CD because ___?\r
\n" ); document.write( "\n" ); document.write( "b. BC≅DC because ___?\r
\n" ); document.write( "\n" ); document.write( "c. ∴ BC≅DE because ___?\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #474375 by jim_thompson5910(35256) $\"\"$ $\"About$

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Complete the proof.
\n" ); document.write( "Given: ∠DCE≅∠CDE≅∠DEC; ∠CDB≅∠CBD
\n" ); document.write( "Prove: BC≅DE
\n" ); document.write( "a. DE≅EC≅CD because __CPCTC__
\n" ); document.write( "b. BC≅DC because __CPCTC__
\n" ); document.write( "c. ∴ BC≅DE because __Substitution Property__\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Note: CPCTC stands for \"Corresponding Parts of Congruent Triangles are Congruent\" \n" ); document.write( "

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