I heard my geometry teacher recite this so often that
I can still recite it from memory:
"In a 30 - 60 right triangle, the side opposite the 30 is
half of the hypotenuse, and the side opposite the 60 is
half of the hypotenuse times the square root of 3."
That was almost 60 years ago, but I believe it's still true.
He was quite a memorable teacher.