Is the altitude of Polaris equal to your latitude ?

Let us remind about the definition of Geographical Latitude "G.L." :

The North Star Polaris is to the upper right. In any math book - you may find drawings like below:

- telling that the angles W and Z are equal.

You may find these angles on the next figure too :

Comparing the angles gives again

So, we have demonstrated that the Altitude of Polaris above the horizon is equal to the observers' Geographical Latitude.