A postulate __ is an idea that has to be shown to be true through a chain of reasoning. is an idea that is assumed to be true or is self-evident. can be shown to be true with a two-column sequence of Itstatements// and II reasons/I. is the same thing as a proof.

## Step 1<br />A postulate, also known as an axiom, is a statement that is accepted as true without proof. It is a fundamental concept in geometry and other branches of mathematics. <br /><br />## Step 2<br />Postulates are not proven because they are considered to be self-evident or fundamental truths. They serve as the foundation upon which other theorems are built.<br /><br />## Step 3<br />The other options provided are not accurate descriptions of a postulate. Specifically:<br />1. A postulate is not an idea that has to be shown to be true through a chain of reasoning. That would be a theorem.<br />2. A postulate is not something that can be shown to be true with a two-column sequence of statements and reasons. That would be a proof.<br />3. A postulate is not the same thing as a proof. A proof is a logical argument that establishes the truth of a statement, while a postulate is a statement that is accepted as true without proof.