Seems pretty straight foward, this is the golden ratio
Now find some dimensions, ie length of face divided by length of chin to eyeline
Find a life-size 'head shot' of a celebrity - a rather easy task using the internet (you might have to resize it in the beginning).
Find the measurements, in ratio form - similar to how it was done in the class, of the celebrities facial features/structures.
Does the celebrity have any structures or features that when compared or written as a ratio seem to be close to the golden ratio?
How in the world would I do this?