Urči základní velikost úhlu:
\( -57\:880\degree \)
\( \large -280\degree = 360-180 = 90\degree \)
\( \large -280\degree = 360-180 = 60\degree \)
\( \large -280\degree = 360-180 = 80\degree \)
\( \large -280\degree = 360-180 = 100\degree \)