Jennifer was going to sell all of her stamp collection to buy a video game. after selling half of them she changed her mind. she then bought fifteen more. how many did she start with if she now has 43?

< 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⭐

44

step-by-step explanation: