Free points to celebrate my rank up! (will be doing this from here on out every rank up I earn)

hi good job on your rank up

Step-by-step explanation:

congrats mate

Step-by-step explanation:

i am also gaining new rank

< 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 : )