Assertion: sextant's mirror | /r/HasProperty | rotated
Facets:
value: away from the parallel
type: OTHER
Source sentences:
text: When the mirror is rotated away from the parallel, the total change in the angle of reflection from the rotated mirror is twice the amount of rotation (angles 5 and 6).
text: Once done, it is then just a matter of precisely measuring the angle the movable mirror was rotated.