Can someone help me out, please? Its really important

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

Can any one me with the answers to these questions asap?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.