Geometry

True
It is true that the body of an indirect proof you must show that the assumption leads to a contradiction. In math a proof is a deductive argument for a mathematical statement.

For Apex the answer is “True“.

This is true in a very basic sense. But statements cannot always be flipped around this way. I don't know if you're talking about programming or logic, but in programming, say you have the statement:

if count == 34 then endloop = true.

There may be another statement later that turns endloop true no matter what.

In logic, if the "if" statement has absolutely nothing to do with the "then" statement, then the answer to your question is false

-FALSE!

True

A corollary is a statement that can easily be proved using a theorem.

Postulates and axioms are accepted without proof in a logical system. Theorems and corollaries require proof in a logical system.

[Logical] argument.

false

true

A conclusion provided by deductive reasoning

The term that best describes a proof in which you assume the opposite of what you want to prove is 'indirect proof'.

In a two-column proof, it is true that the left column states your reasons.

It is true that postulates are statements that are accepted without questions or justifications.

The question asks about the "following". In those circumstances would it be too much to expect that you make sure that there is something that is following?

Perpendicular lines intersect each other at right angles which is 90 degrees.

True

False

Flowchart proof

False

Boxes and arrows.

Corollary.

Theorem.

Definition.

Postulate.