In a geometric proof, statements can be justified using axioms, definitions, postulates, and previously proven theorems. Axioms are self-evident truths that do not require proof. Definitions clarify the meaning of terms used in the proof. Postulates are basic assumptions that are accepted without proof. Theorems are statements that have been proven true and can be used as justification for subsequent statements in a proof.
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).