Answer: The difference between a theorem and postulate is the following:
Postulates are assumed to be true without the need for proof. Theorems can and need to be proven to be true.
Explanation:
Examples:
Postulate: A line contains at least two points.
Theorem: The Pythagorean theorem is a theorem since we use it to prove that a^2 + b^2 = c^2 to figure out the side lengths of a right triangle