Match the clue word with the operation difference

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

What is the range for 31,39,29,34,37,24,36,33,34,28

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement