Answer:
The angle 7 is equal to angle 1. They are vertically opposite angles.
I can talking a flow proof about geometry
A flow proof is just one representational style for the logical steps that go into proving a theoremor other proposition; rather than progress read in two columns, as traditional proofs do flow proofs utilize boxes and linking arrows to show the structure or the argument.
Lol yes I can factor that.

But, this can be factored further.
Answer: a
Step-by-step explanation: