Answer:
Step-by-step explanation:
The reason for statement 1. is "vertical angles"...those are in the middle of the image, created by two crossing lines. They are angles, so the second answer cannot be right. They are both angle E, so the third answer cannot be right.
Both the first answer and the last have good statement for the blank 1.
The third, fourth and fifth statements in the proof show the angle A and C are congruent, the angles E are congruent and the segments in between are congruent... that would be angle-side-angle--- ASA
So that means the first choice is the correct answer.
