Question

What is one sixth of a right angle?

Answer 1

If you call a right angle "90 degrees",
then 1/6 of it is                                    (90/6) = 15 degrees .

If you call a right angle "pi/2 radians",
then 1/6 of it is                                    (pi/2) / (6)  =  (pi / 12) radians .