**Definition of Postulate**

- Postulate is a true statement, which does not require to be proved.

**More about Postulate**

- Postulate is used to derive the other logical statements to solve a problem.
- Postulates are also called as axioms.

**Example of Postulate**

- To prove that these triangles are congruent, we use SSS postulate, as the corresponding sides of both the triangles are equal.

**Solved Example on Postulate**

State the postulate or theorem you would use to prove that ∠1 and ∠2 are congruent.

Choices:

A. corresponding angles postulate

B. converse of corresponding angles postulate

C. alternate angles are congruent

D. adjacent angles are congruent

Correct Answer: A

Solution:

Step 1:∠1 and ∠2 corresponding angles.

Step 2:Since the linesaandbare parallel, ∠1 and ∠2 are congruent. [Corresponding angles postulate.]

Step 3:So, corresponding angles postulate is used to prove that ∠1 and ∠2 are congruent.

**Related Terms for Postulate**

- Axiom
- CA Conjecture
- SAA Postulate
- SAS Postulate
- SSS Postulate