Car manufacturer emblems

I'm been thinking about emblems lately. I think its because I look at cars coming around the course and I don't know what they are. I think, how will I identify this car if it hits a cone, because I don't know what it is. So, I started thinking that I should pay more attention while I'm driving and maybe I'll figure out what's confusing me.
It worked.

here is a selection of the most common brands at autox:

They are all round!

here are the exceptions:


of course this one is a hybrid:


and this is what marks me as a "girl"; do you see the differences between these 2 cars?
the only way I can tell is to look at the logos.