Consider the proof. given: segment ab is parallel to line de. prove: startfraction a d over d c endfraction = startfraction b e over e c endfraction triangle a b c is cut by line d e. line d e goes through side a c and side b c. lines a b and d e are parallel. angle b a c is 1, angle a b c is 2, angle e d c is 3, and angle d e c is 4. a table showing statements and reasons for the proof is shown. what is the missing statement in step 5? ac = bc startfraction a c over d c endfraction = startfraction b c over e c endfraction ad = be startfraction a d over d c endfraction = startfraction b e over e c endfraction