CBSE Class 9 Answered

Axioms & Postulates are basic assumptions and accepted without detailed demonstration. All other theorems must be proven with the help of basic assumptions. In many subjects related to science and mathematics, they lay certain additional hypotheses which are accepted without proof. Such a hypothesis is termed as postulate. On the other hand, axioms are common to lot of subjects whereas postulates of each subject are different.

Example:

Axioms: Things which are equal to the same thing are also equal to one another(Same in all subjects). 

Postulates: It is possible to draw a straight line from any point to any other point(Only Geometry)