I am a newbie

jay50

I am a newbie trying to set up 3.1 surround sound system with Couches that form L-shap the photo that i have will show you where I placed the front speakers just want to know if you can draw lines pointing in the direction that the speakers will point to the couch and What angleup I should set them up I also have a laser pointer can you can draw lines from the front and central channel speakers to the couch I'd really appreciate it also if I'm going to take two measurements which seats do i use The mic in here is a
picture