Pls help, i really need this done. i’d appreciate it, thank u

answer: 91

step-by-step explanation:

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

only 10/60 isn't equivalent

hope this : )

a: 1/6, j: 1/4

step-by-step explanation: you are welcome