Let A=(0,0), B=(7,2), C=(3,4), D=(3,7) and E=(-1,5). Cameron walks the polygonal path ABCDEA, writing down the number of degrees turned at each corner. What is the sum of these five numbers? Notice that ABCDE in not a convex pentagon.

I got 491.(using a protractor) Could someone take a look at my attached work?

oops, on my last line of attached work i meant if angle c was convex