Question

which of the following is not an essential part of a two - column proof?
staircase logic
given information
statement of the theorem
plan of proof
figure

Explanation:

A two - column proof typically includes a figure (to visualize the problem), given information (the starting facts), a plan of proof (an overview of the steps), and a statement of the theorem (what is being proved). Staircase logic is not an essential part of a two - column proof. Staircase logic is more of a general problem - solving or logical reasoning concept in a broader sense, not specific to the structure of a two - column proof.

Answer:

O Staircase logic