Can you me out with this question i really need it youu❤️

<c =60

Step-by-step explanation:

The angles of a triangle need to add up to 180 degrees. if you subtract 40 and 80 from 180 you will come up with the answer 60

b.an increase in a causes b to decrease

< 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⭐