Am I golden?

We are in the XVI th century and the greatest artists decide that the perfection is in "The Golden ratio" related to Φ (phi) number. You can see this pefection in paintings as:

So, do you know if you are perfect according to these ideas (remember that we are in the XVI th century )?

The golden students in 1r ESO are:

Najwa

 Angela

 Marina

 Maria

How did we discover it?