How many degrees are there in a 1 quarter turn?

1 turn = 360 degrees

1/2 turn = 180 degrees

1/3 turn = 120 degrees

1/4 turn = 90 degrees

1/5 turn = 72 degrees

1/6 turn = 60 degrees

1/8 turn = 45 degrees

1/9 turn = 40 degrees

1/10 turn = 36 degrees

1/12 turn = 30 degrees