Subclassing and Exposing superclass - Is it a Facade design pattern?

Lets assume we have a class A, and 2 subclasses of this class - class A1 and class A2

If we do not know if an object coming in is of type A1 or A2, we do something like: object = incomingObject as A

Is this still using the Facade design pattern? Or is there a different name for this pattern?(maybe just simple inheritance)