The interior bisector of angleB and exte...

The interior bisector of `angleB` and exterior bisector of `angleC` of `DeltaABC` meet at D. Through D, a line parallel to CB meets AC at L and AB at M. If the measures of legs LC and MB of trapezoid CLMB are 5 cm and 7 cm respectively. Find the measure of base 'LM'

3 cm

2 cm

`(3)/(2)cm`

5 cm

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