1.
1. given
2.
2. given
3. AB = ED; BC = DC
3. def. of
4. AB + BC = AC;
ED + DC = CE
4. segment addition postulate
5. ED + DC = AC;
ED + DC = CE
5. substitution property
6. AC = CE
6. substitution property
7.
7. def. of
8.
8. reflexive property
9. ♣
9. ASA
10.
10. CPCTC