The length of LO is as AB which is 6 units.
According to the question, quadrilateral ABCD is translated down and left to form quadrilateral OLMN.
As the quadrilateral is just shifted first down and then left but not changed in the dimensions so, the dimensions of the new quadrilateral OLMN will also be the same as ABCD.
Hence, the length of LO is as AB which is 6 units.
Learn more about quadrilaterals here:
https://brainly.com/question/6321910