How to do area for this problem

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

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl

Which best describes the construction of a triangle if given the segment lengths of 2 cm, 3 cm, and 5 cm? a) unique triangle b) cannot be determined c) triangle not possible d) more than one triangle