There are 360 degrees in a circle, therefore 1/6 of a circle is 60 degrees.
There is no simple answer. There are simple formulae for simple sequences such as arithmetic or geometric progressions; there are less simple solutions arising from Taylor or Maclaurin series. But for the majority of sequences there are no solutions.
The expression "acyclic number" is not recognised: additional context may help.
Divergent and convergent are both boundaries that form different kinds of landmasses.
Tis useful very much indeed, specially in the times blacksmiths rather have to create certain objects and use expansion. Tis great because they can mould things once they've expanded. So YAH >>>>>>