[tex]\frac{|CE|}{|AC|} =\frac{|CD|}{|BC|} \\\frac{60cm}{15cm} =\frac{68cm}{|BC|} \\60cm*|BC|=15cm*68cm\\|BC|=\frac{15cm*68cm}{60cm} \\|BC| =17cm\\\\\frac{|MN|}{|LM|} =\frac{|MO|}{|KM|}\\\frac{64cm}{|LM|} =\frac{48cm}{6cm} \\48cm*|LM|=64cm*6cm\\|LM|=\frac{64cm*6cm}{48cm} \\|LM|=8cm\\|LN|=|LM|+|MN|=8cm+64cm=72cm[/tex]
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[tex]\frac{|CE|}{|AC|} =\frac{|CD|}{|BC|} \\\frac{60cm}{15cm} =\frac{68cm}{|BC|} \\60cm*|BC|=15cm*68cm\\|BC|=\frac{15cm*68cm}{60cm} \\|BC| =17cm\\\\\frac{|MN|}{|LM|} =\frac{|MO|}{|KM|}\\\frac{64cm}{|LM|} =\frac{48cm}{6cm} \\48cm*|LM|=64cm*6cm\\|LM|=\frac{64cm*6cm}{48cm} \\|LM|=8cm\\|LN|=|LM|+|MN|=8cm+64cm=72cm[/tex]