Question 855658
*[illustration 400_60degrees].
{{{400^o=360^o+40^o}}}
Positive angles are counterclockwise turns.
A {{{400^o}}} angle is a whole counterclockwise turn plus a further {{{40^o}}} counterclockwise turn.
 
Negative angles are clockwise turns.
A {{{-60^o}}} angle is a clockwise {{{60^o}}} turn.