2. Gabby spent $3.60 for stamps to mail packages. Some were 30C/stamps and the rest were 20C/stamps. The number of 20C/stamps was 2 less than the number of 30C/
stamps. How many stamps of each kind did Gabby buy?

idk

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⭐

what