30 degrees
?/6
45 degrees
?/4
60 degrees
?/3
120 degrees
2?/3
135 degrees
3?/4
150 degrees
5?/6
210 degrees
7?/6
225 degrees
5?/4
240 degrees
4?/3
90 degrees
?/2
180 degrees
?
270 degrees
3?/2
300 degrees
5?/3
315 degrees
7?/4
330 degrees
11?/6
360 degrees
2?