document.write( "Question 934328: \"Image\r
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Algebra.Com's Answer #567393 by josgarithmetic(39621)\"\" \"About 
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This same question identically was asked two more times. This response will not be a formal proof, but just a helpful description.\r
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\n" ); document.write( "\n" ); document.write( "You know that AB contains the collinear points D and E, and that AB is a segment, forming supplementary angles at D and at E. You know from this that angles ADC and BEC are congruent,... something about supplementary angles of congruent angles...\r
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\n" ); document.write( "\n" ); document.write( "You have at least, these ... statements:\r
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\n" ); document.write( "\n" ); document.write( "AD congru BE | Given
\n" ); document.write( "angles CDE congru CED | Given
\n" ); document.write( "angles ADC congru BEC | Reason discussed above
\n" ); document.write( "Triangles ADC and BEC congruent | Not know how to state this theorem, but two sides and included angles....
\n" ); document.write( "Segments AC congru BC | Corresponding parts of congruent triangles...\r
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\n" ); document.write( "\n" ); document.write( "Excuse abbreviations. \n" ); document.write( "
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