How to fence corners on a lot that is not square

I'm interested in installing a wood privacy fence myself. I've watched a bunch of tutorials and feel pretty confident with the process except for one thing. Everything I've seen talks about squaring up the corners, however, my lot is not square. How do you do corners that are less than 90 degrees (corners B or D) or more than 90 degrees (corners A or C)? I'm also a little stumped about what to do with corner C. Would the post go on the outside of the fence?

Update: Thanks everyone for your input. There were a lot of comments about building a fence on the easement. The permit was previously approved even with the fence going over the easement. However, I've reached out the utility companies and they said I might not be able to put the fence on the easement but they were going to review my plat of survey and maybe come do a site visit. So, I called my village permitting department and they said that it's my property so I can put the fence there regardless of what the utility companies say. That response seems a little strange to me, so I'm not sure what the outcome will be. My backdoor neighbor already has a fence along the back of my lot so I figured it wouldn't be a big deal. I would consider using their fence instead of building my own, but it's a two rail split rail fence and won't really do a good job at keeping the dog in.