1.
1. given
2. AB = ED; BC = CD
2. def. of
3. AB + BC = AC
ED + DC = CE
3. segment addition postulate
4. ED + DC = AC
ED + DC = CE
4. substitution
5. AC = CE
5. substitution
6.
6. def. of
7.
7. reflexive property
8. ♣
8. SAS
8. ♣
8. SAS
8. ♣
8. SAS