Answer:
1. I think its given (usually the first is always given)
2. definition of midpoint
3. maybe the third one is also given (probably in a diagram or something)
4. substitution
5. transitive property
6. symmetric property
7. definition of congruence
some of these may be different then the actual answer as there is no diagram to see what is given and what isnt
Step-by-step explanation:
