she caught it just add 38 MINSA
statement #3: proof- ang is congruent to ang ecd : angles are congruent.
1: the missing angles in statement #3
reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.
2: the missing word in reason #3
reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.
i hope that was and understanding.