/diy/ - Do It Yourself

How do I paint a 3 point line on a outdoor concrete basketball court? I play with a friend at a local court but there's no 3 pt line and my friend is always fucking shooting 2s and calling them 3s so i'm going to paint a damn 3pt line so he knows.

I bought spray paint and measuring tape, but I can't find any solid info on how to paint just the 3 point line.

The main problem is that it's a straight line in the corners, which is easy, but then it's a big curve after that. I can only think to use some string and use that to paint a good circle.

How do I paint the curved part of line? I don't want to spend heaps on painting a single line.