The school is planning to add two new playgrounds each playground will be there in the shape of a square that measures 30 3 am by 30 3 am but will be in the area of the playgrounds?

< 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⭐

4444444444444 i think