BLEH

So today I took a geometry quiz and there was this last question about finding the Perimeter of a triangle right?
Now I know "Perimeters are SO EASY TO FIND"
That is very true, but not this one!
WTF!!! This triangle had a gigantic circle in it that threw me off ( I D K Y)
and then all the side lengths were letters! NO NUMBERS! NOTHING MAKES SENSE!!
I HATE MATH@@@ ARGH!! <-- going insane