document.write( "Question 1019281: Please help me with my proof.\r
\n" ); document.write( "\n" ); document.write( "Given: DE || FG || HJ
\n" ); document.write( "Prove: DF x GJ = FH x EG\r
\n" ); document.write( "\n" ); document.write( "The diagram shows the three horizontal parallel lines being intersected by two vertical transversals, DH & EJ. DH, on the left, defines angles D, F & G while EJ, on the right, defines angles E, G & J. \n" ); document.write( "
Algebra.Com's Answer #635327 by ikleyn(52803)\"\" \"About 
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\n" ); document.write( "See the lesson Three parallel lines cut off proportional segments in any two transverse lines in this site.\r
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\n" ); document.write( "\n" ); document.write( "You will find the proof of this property there:\r
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\n" ); document.write( "\n" ); document.write( "      If three parallel lines are intersected by two transverse lines, then the ratio of the segment lengths they cut off \r
\n" ); document.write( "\n" ); document.write( "      in one transverse line is equal to the ratio of the segment lengths they cut off in the second transverse line. \r
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