Use a translation rule to describe the translation of x that is 1 units to the left and 6 units up
a. t< -1,6> (x)
b. t< -1,-6> (x)
c. t< 1,6> (x)
d. t< 1,-6> (x)

< 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⭐