Răspuns :
m(arcBC)=75 grade (este arc mic si are ca masura masura arcului cuprins intre laturi)
\m(arc BAC)=360-m(arcBC)=360-75=285 grade
\m(arc BAC)=360-m(arcBC)=360-75=285 grade
daca m( m( arc BC) =75 grade (deoarece este < la centru);
360 -75 = 285 ; m( arc BAC) = 285 grade