Postulate, Corollary, Definition, & Theorem
Corollary.Theorem.Definition.Postulate.
Vertical angles
Corollary.Theorem.Definition.Postulate.
Theorems, definitions, corollaries, and postulates
yes
conclusion
Postulate, Corollary, Definition, & Theorem
Corollary.Theorem.Definition.Postulate.
Vertical angles
Corollary.Theorem.Definition.Postulate.
Theorems, definitions, corollaries, and postulates
Since you didn't include the statements in your question there is no way for us to know
Steps in a geometric proof do not require support
Yes.
no
Axioms and logic (and previously proved theorems).