Question

How many degrees in a quarter rotation.

Answer 1

360 degrees is a full rotation, and a quarter of that is a right angle, or 90 degrees

Answer 2

$a\ quarter=\frac{1}{4}\\\\a\ full\ rotation\ has\ 360^o\\\\therefore\\\\a\ quarter\ rotation=\frac{1}{4}\cdot360^o=\boxed{90^o}$