Need help
plz and thank u

5-1/10

Step-by-step explanation:

4-1/2+3/5=

9/2 + 3/5=

45/10+6/10=51/10=5-1/10

< 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⭐

the two may have that, even a breakdown is probably offered