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The diagram: The shape or shapes in the diagram are the subject matter of the proof.
The givens: These are true facts about the diagram that you build upon to reach your goal, which is the prove statement.
The prove statement: It is the fact about the diagram that you must establish with your chain of logical deductions.
The statement column: This is where one puts all the given facts, the facts one deduces, and in the final line, the prove statement.
The reason column: In the reason column, you put the justification for each statement that
you make. In this column, you write general rules about things in general, such as If an angle is bisected, then it’s divided into two congruent parts