om si on fiind bisectoare inseamna ca imparte unghiul in doua parti egale deci;
daca nob=50 grade si aon=50 grade =>aob=100 grade
daca aoc=140 grade inseamna ca boc=aoc-aob deci boc=140-100=>boc=40
om bisectoarea unghiului boc =>bom=boc/2 deci bom=40/2 => bom=20
aom=aob+bom deci aom=100+20 =>aom=120 grade
noc=nob+boc deci noc=50+40 =>noc=90 grade
nom=nob+bom deci nom=50+20 =>nom=70 grade